20 Best B2B Email List Providers [Ranked & Rated] | CIENCE

For B2B marketing, contact data is the glue that holds nurturing campaigns together and provides a driving force for everything from lead generation to customer interaction. Whether you are seeking to increase the scope of customers or enter a different market, selecting an email list provider can help.

However, with so many providers offering similar services, how do you find a reliable one for your needs? We’ve compiled a list of the 20 best B2B email list providers to help you target regional or global audiences, minimize campaign inefficiencies, and boost sales. Dive in to explore your top options.

1. CIENCE

CIENCE’s exclusive MemoryAI technology helps you reach the most relevant prospects by delivering highly targeted and precise B2B email lists, increasing your chances of conversion and reducing wasted outreach efforts. MemoryAI processes billions of online behaviors, such as search queries, site visits, and social media engagements, to pinpoint in-market buyers, allowing you to engage prospects at just the right moment and ahead of your competitors.

Top Features

• Massive Database: CIENCE offers access to an extensive B2B database with 255 million contact records, including verified emails, direct dials, and professional details, ensuring you can confidently reach key decision-makers and open doors to exciting new opportunities.
• MemoryAI Intent Data: Our cutting-edge AI analyzes buying signals across multiple levels, giving you the confidence to tailor your strategy based on highly specific, individual needs.

• ICP-Fit Guarantee: We guarantee the accuracy of leads that match your Ideal Customer Profile (ICP), whether you're targeting tech startups or large enterprises, so you can trust you’re always working with the highest-quality prospects—or we’ll replace them for free.
• Industry Coverage: With data from 149 industries, including technology, finance, and healthcare, CIENCE offers comprehensive coverage for diverse B2B businesses, whether focused on niche markets or broad verticals, ensuring you never miss an opportunity to find qualified leads in your exact niche.

Advantages of Using CIENCE

CIENCE stands out by harnessing advanced AI and delivering precise, reliable data that gives you the confidence to target the right prospects with unmatched accuracy, like identifying companies in the market for CRM solutions or recently funded startups looking for HR tools, enabling you to target the right prospects with greater accuracy. MemoryAI provides precision and insight that traditional list providers can't match. Our ICP-fit guarantee further reinforces their commitment to delivering high-quality data.

• Uncover Hidden Opportunities: MemoryAI reveals prospects showing subtle signs of interest in your solutions, even before they reach out directly, such as a company frequently visiting pricing pages or downloading product whitepapers, allowing you to engage with them early and build relationships before your competitors even know they exist.
• Maximize Marketing ROI: Target high-intent prospects like those who have interacted with your website or downloaded key content. This allows you to shift focus from leads that probably won't convert and ensure every dollar flows towards genuine opportunities.
• Gain a Competitive Edge: Real-time intent data enables you to reach out to prospects in decision-making instead of your competition, positioning yourself as a more likely winner for both the deal and the new business.
• Personalize Your Campaigns: Use knowledge of prospect motivations and behaviors to craft tailored, compelling messaging that feels sincere and impactful and drives higher conversion rates.

Why do Companies Prefer CIENCE

CIENCE is a leading provider of B2B email lists, combining advanced AI-driven lead generation, a database of over 255 million verified contacts, and an unwavering commitment to data accuracy. Clients trust CIENCE to deliver precise, actionable leads that drive better engagement and boost confidence in their marketing efforts, leading to higher conversion rates and greater success. 

• Integrated Sales and Growth Teams: CIENCE aligns its sales and growth teams to create seamless communication and collaboration, delivering personalized solutions that make clients feel heard and understood. By providing alternative strategies or tools that are more cost-effective, CIENCE enables clients to pursue their goals without fear they will over-invest resources for the ROI.
• Client-Centric Approach: Most importantly, at CIENCE, clients are our lifeblood. We have frequent follow-ups, transparent communication, and immediate responses to all complaints, and this has helped us guarantee that every client feels valued and supported. This hands-on approach builds lasting trust and forges strong, long-term partnerships that clients can rely on for continued success.
• Efficient Onboarding Process: CIENCE’s onboarding process is designed to be smooth and stress-free, with detailed timelines, clear action steps, and dedicated account management. From the start, clients feel confident and empowered, knowing exactly what to expect, minimizing delays, and setting the stage for long-term success.
• Strategic Guidance and Support: Clients deeply appreciate the strategic insights and personalized feedback provided by CIENCE’s team, knowing that it directly impacts their sales performance. For instance, one team member’s implementation of new objection-handling frameworks boosted conversion rates. It empowered the SDRs with the confidence to engage more effectively, creating a more motivated and successful sales team.

These real-world case studies demonstrate the transformative power of CIENCE's data-driven customer generation strategies, helping companies in industries like tech and manufacturing achieve measurable growth and take their sales pipelines to new heights:

• Okta: CIENCE enriched over 1 million contact records for Okta, focusing on key decision-makers in IT and security. This empowered Okta to reach its ideal market faster, optimize campaigns with precision, and accelerate its sales pipeline with high-quality prospects, giving its team the confidence to drive faster results.
• Manufacturing Client: CIENCE exceeded expectations for a manufacturing client specializing in industrial equipment, securing a steady stream of high-quality appointments. This surge in qualified leads fueled a 20% revenue increase and relieved the sales team, streamlining operations and freeing them from chasing low-quality prospects.
• Information Technology & Services: CIENCE’s strategic outbound campaigns sparked a 500% increase in monthly new appointments for a client targeting mid-market tech firms. This incredible surge in engagement led to a 40% rise in closed deals, empowering the client to scale operations rapidly and expand into new regions with newfound confidence and momentum.

CIENCE Pricing

CIENCE offers flexible service packages tailored to your needs, from customized campaign strategies to data analysis support. This flexibility empowers clients to take control of their budget, ensuring they pay only for what they need, with the confidence that they’re maximizing their investment—free from the constraints of a rigid price-per-contact model.

2. Outreach

Outreach is a sales engagement platform with list-building tools for B2B email management, offering capabilities like automated list segmentation, data enrichment, and email verification. These tools help streamline prospect identification and engagement across email, phone, and social media channels.

Top Features

• Prospecting Tools: Outreach provides tools to identify and research potential customers, offering detailed company insights, contact roles, industry-specific data, and revenue metrics, helping you focus on qualified leads efficiently.
• List Building: Create targeted prospecting lists based on industry, company size, or role title, allowing for more personalized campaigns with higher engagement rates.
• Data Enhancement: Automatically enrich contact data from sources like LinkedIn, company databases, and social profiles to ensure accuracy and lead completeness.
• Email Verification: Confirm email addresses, lower bounce rates, and enhance arrive-at rates; this leads to high future performance for your future campaigns.
• Integrations: Integrate with popular customer management tools like Salesforce, HubSpot, Marketo, and other marketing tools to streamline your workflow and centralize data.

What are some limitations of Outreach?

• Overpriced: Many users feel the platform is expensive compared to alternatives like Salesloft or HubSpot, especially when factoring in the available features and support levels (G2).
• Unreliable Data: Users have reported inconsistencies such as outdated contact details and incomplete company profiles, making it difficult to trust or act on, with the presentation of this data sometimes being overwhelming or hard to navigate (Gartner).
• Clunky Interface: Some users have found the interface slow to respond, and the complex layout makes simple tasks like setting up calls or managing pipelines unnecessarily difficult (G2).
• Operational Inefficiencies: Users have reported multiple issues, including inconsistent call functionality, difficulties accessing notes, frequent error messages, and duplicate contacts, all contributing to a disrupted workflow (G2).
• Untrustworthy Business Practices: Some users have expressed concerns about the company’s business practices, citing missed contract terms, unclear billing policies, and poor communication (Trustpilot).
• Poor Customer Support: Users have expressed dissatisfaction with slow response times and unhelpful resolutions, citing that customer support often fails to address their concerns effectively (Trustpilot).

3. Zoominfo

ZoomInfo is an email list-building tool and B2B data provider that maintains a database with more than 100 million records of business contacts and company profiles. Businesses use it to create segmented email lists and gather more information about their potential prospects.

Top Features

• Extensive Database: ZoomInfo offers one of the largest B2B databases, containing millions of business contacts and company profiles.
• Advanced Search Filters: Apply advanced search filters, such as industry, company size, and career title, to drill down your searches and discover precise business contacts.
• Data Accuracy: ZoomInfo uses detailed data verification processes, including AI-driven cross-referencing and manual checks, to ensure the accuracy and reliability of its contact data.
• Intent Data: Intent data tracks web searches, content consumption, etc., for a better understanding of prospects who are currently researching products or services in your domain.
• Integrations: Data can be integrated into popular customer management and marketing automation platforms like HubSpot, Salesforce, and Pipedrive, allowing you to automatically sync contact details, track engagement, or streamline your workflows.

What are some limitations of Zoominfo?

• Inaccurate and Outdated Information: Users report contact details, and company details are often inaccurate or outdated, such as incorrect career titles, outdated email addresses, and wrong company locations, leading to wasted time and reduced confidence in the data (Gartner).
• Unreliable Intent Data: Some users find that the intent data can be inaccurate, with unclear or irrelevant signals, making it difficult to derive actionable insights (Gartner).
• High Cost: ZoomInfo is often considered expensive compared to competitors like SalesIntel and Lusha, with users citing outdated data and incomplete organizational details, such as missing employee counts and revenue figures (Gartner).
• Poor Customer Service: Users report dissatisfaction with customer service, citing quarterly system resets—often resulting in account shutdowns—and a lack of adequate technical support (Gartner).
• Software Bugs and Issues: Users report frequent software bugs, including system crashes, slow loading times, and data syncing issues, which cause interruptions in day-to-day operations (Gartner).
• Chrome Extension Malfunction: The ZoomInfo Chrome extension frequently malfunctioned, with issues like data not syncing properly, login failures, and incorrect contact details, and the company failed to honor its 99% uptime guarantee, leading some clients to extend their contracts despite ongoing issues  (G2).
• Ineffective Onboarding and Misalignment: The onboarding process is reportedly inefficient, with slow account setup, minimal training support, and unclear documentation. The platform often lacks customization options that small businesses need despite claims made by the sales team (G2).

4. Cognism

Cognism is a B2B data provider offering full global privacy regulation compliance (GDPR and CCPA), regular audits, and thorough processes for handling the most sensitive data. ‍It follows industry standards to maintain data accuracy and security to ensure privacy.

Top Features

• Globally Compliant Data: Cognism reviews data on a regular basis and removes or updates records to meet compliance guidelines with global regulations, such as GDPR and CCPA.
• Phone-Verified Data: Ensures the accuracy of contact info by making phone calls to verify and reduce significantly outdated or incorrect data.
• Sales Trigger Data: View which companies are experiencing relevant events such as a funding round, mergers and acquisitions, or new leadership hires, which can signify buying intent.
• Integrations: Cognism integrates with tier-1 customer management software and sales engagement platforms such as Salesforce, HubSpot, and Outreach to simplify data management.
• Data Enrichment: Enhance your customer, prospect, and other contact records with more information like changes in their field, role title, or company.

What are some limitations of Cognism?

• Limited US Contacts: Cognism’s database lacks depth for US contacts, particularly in specific industries or smaller markets, often requiring users to supplement with another tool for complete coverage (Gartner).
• Poor Data Quality: Users report issues with outdated email addresses, incorrect career titles, and company details, leading to a significant likelihood of inaccuracies in contact details (G2).
• Inadequate Contact Data: Users have noted missing details like contact numbers or company roles, and the export process is often complex and costly, with limited options for bulk data exports (Gartner).
• Inaccurate LinkedIn Information: Sometimes, the LinkedIn information provided connects to the wrong person (Gartner).
• Inclusion of Private Numbers: Some private numbers are erroneously included in contact lists (Gartner).
• Overpriced Compared to Free Tools: Cognism is considered expensive compared to free alternatives, especially given concerns about its data quality (G2).

5. Lead411

Lead411 is a B2B data and intelligence platform with verified contact data, such as direct contact numbers and emails. Providing intent data, the platform focuses on accurate and reliable information, which allows consumers to identify better leads by observing online behavior.

Top Features

• Verified Contact Data: Lead411 utilizes a two-tiered verification process consisting of email validation and phone root domain insight to provide users with the most reliable contact data.
• Intent Data: This platform captures key in-market behaviors such as searches, website visits, content engagement, and purchase signals—like downloads or product comparisons—helping you reach prospects actively seeking solutions.
• Lead Scoring: Uses email open rates, company interaction on websites, purchase intent, and company size in order to rank leads by the Lead411 lead scoring system.
• Integrations: You can also integrate Lead411 with the customer management tool and/or marketing automation platform of your choice (e.g., Salesforce, HubSpot, or Marketo) for smoother workflows.
• Chrome Extension: You can use their Chrome extension to access Lead411 data directly from within your web browser, so you don't have to switch tabs to find contact info while browsing LinkedIn, websites, or client relationship management platforms.

What are some limitations of Lead411?

• Slow Customer Support: Users report inconsistent updates to contact data, with frequent difficulties finding accurate email addresses. Many profiles only list company HQ contact numbers, lacking direct contact details (Gartner).
• Limited & Inaccurate Contact Data: Users report inconsistent updates to contact details, with frequent difficulties finding accurate email addresses and direct numbers. Many profiles only list company HQ contact numbers, lacking personal or department-specific contact details (G2).
• Limited Features Outside the US: The platform primarily caters to the American market, with data accuracy, contact coverage, and customer management integrations being less comprehensive for users outside the US (G2).
• Cost Issues: Lead411 is considered more expensive than competitors like ZoomInfo and Apollo, especially given its limitations in data accuracy and international features (Capterra).
• Chrome Extension Issues: The Chrome extension frequently requires updates, often interrupting user workflows by causing logouts, slow performance, or temporary data unavailability during browsing sessions (Capterra).

6. Lusha

Lusha is a sales intelligence platform that gives you access to accurate contact info, including direct numbers and email addresses for professionals across an array of industry segments. The system delivers a very simple user interface, and its freemium plan offers the fundamental features for free with paid access to more advanced tools.

Top Features

• Extensive Database: Over 45 million business contacts with verified email addresses, direct dials, and social profiles across multiple industries.
• Prospecting Tools: Lusha connects you with your prospects and allows you to search for new B2B companies every day based on career title, company size, and industry, systemizing your client generation.
• Email and Phone Verification: Ensure the accuracy of your email addresses and contact numbers, increasing deliverability on campaign efforts.
• Chrome Extension: Get Lusha's information directly from your web browser with their Chrome extension; click on the extension icon when looking at a LinkedIn profile or company website, and soon you'll have all the contact details without leaving the page.
• Integrations: Lusha integrates with popular client relationship and sales engagement platforms such as Salesforce, HubSpot, and Outreach.

What are some limitations of Lusha?

• No Mobile Compatibility: Lusha cannot be used on mobile devices, limiting users from accessing contact details or prospecting while traveling or attending events (G2).
• Inaccurate Data: Users report approximately 40% inaccuracy in the data provided despite claims of high accuracy (G2).
• Poor Customer Support & System Bugs: Users describe customer support as unresponsive, with unresolved technical issues and billing problems persisting after subscription cancellations. Many users report difficulties in removing payment methods (G2).
• Overpriced: Users find the platform expensive, particularly since some features, such as email verification and lead accuracy, do not consistently perform as advertised (G2).
• Deceptive Practices: Lusha has been accused of providing false contact info, including non-existent email addresses, and engaging in spam or phishing activities (Trustpilot).
• Scam Allegations: There are serious allegations of scam practices, including harvesting personal information through deception and persistent unwanted contact even after users have requested to stop communications (Trustpilot).

7. Hunter

Hunter is best recognized for its email finder solution but also provides options for growing and handling B2B email lists. It is very handy for sales teams, hiring managers, and marketing professionals who want to rapidly get hold of email addresses or validate contact details using form data.

Top Features

• Email Finder: Hunter finds email addresses for individuals and companies by scanning domain names and publicly available information on websites.  
• Domain Search: Find email addresses from a particular domain in seconds to identify contacts with a company or organization.
• Email Verification: Sort and verify email addresses, reduce bounce rates, and prevent delivery issues.
• Bulk Tasks: Complete bulk email search and verify tasks to find and validate thousands of email addresses, saving on campaigns.
• Chrome Extension: Access Hunter's features directly from your web browser while browsing websites.

What are some limitations of Hunter?

• Expensive Email Verification: Hunter is significantly more expensive than competitors for email verification services, offering fewer verifications at a higher investment (G2).
• Poor Product Integration: Users report that features like email search and sending functions are poorly integrated and expensive. The platform lacks important functionalities, such as automatic credits for inaccurate emails, verified email returns, and detailed bounce rate tracking (G2).
• Ineffective Email Finder Algorithm: The email finder algorithm at Hunter has very high bounce rates, up to 35%, which can negatively affect your domain reputation (G2).

8. Uplead

The B2B data provider Uplead is renowned for its accuracy and user-friendliness. You can also use it to get data on different things, such as direct contact numbers, email addresses, titles, and social media links, which allows you to have a highly focused list of emails.

Top Features

• Accurate Data: Uplead claims a 95% data accuracy rate, achieved through human verification and machine learning processes.
• Real-time Verification: Uplead uses direct verification to check the status of a domain, if there is an existing mailbox, and other factors so that you know the information is current and accurate.
• Technology Tracking: Discover the technologies companies use, whether customer relationship management systems, cloud services, or marketing automation platforms, and adapt your campaign based on a specific tech stack.
• Global Coverage: Uplead offers company information in more than 200 countries, meaning that it is a good fit for businesses with an international presence.
• Integrations: Uplead is an email finder that integrates major customer management tools and marketing automation tools such as Salesforce, HubSpot, and Marketo.

What are some limitations of Uplead?

• Search Functionality Issues: Users report difficulty searching for contacts by name, and the platform often lacks detailed data, such as direct numbers and email addresses, for smaller companies (Gartner).
• Outdated Information: Information is not updated promptly when people leave organizations or when companies relocate, leading to outdated addresses and contact details (Gartner).
• Limited Sample Access: Users cannot pull a sample list of contacts for stakeholder review before purchasing, leaving them to rely on screenshots for previews, which limits the ability to assess data quality before purchase (Gartner).
• Inaccurate Contact Info: Users report frequent inaccuracies, such as missing or incorrect contact numbers, which has led to complaints from sales teams (G2).
• Limited Database: Many needed accounts and contacts are unavailable in the database, and support has been unhelpful in resolving these issues (G2).

9. Snov.io

Snov.io is an email finding and verification platform. Its email finder, email verifier, drip campaign automation tools, and Chrome extension help users build and manage business email lists.

Top Features

• Email Finder: Snov.io finds email addresses for individuals and companies by scanning domain names and publicly available information on websites.  
• Email Verifier: Verify email addresses in bulk to ensure high deliverability rates.  
• Email Drip Campaigns: Create automated email sequences to engage and follow up with leads through personalized, scheduled emails, helping to maintain ongoing communication and improve conversion rates.
• Technology Checker: Identify the technologies companies use, such as customer management systems, cloud platforms, or marketing tools, to tailor your strategies to their needs.
• Chrome Extension: Find and verify email addresses while browsing LinkedIn and other websites.

What are some limitations of Snov.io?

• Account Management Issues: Users have experienced problems with account management, such as data loss and account resets due to technical glitches, leading to difficulties accessing features like domain warm-up (G2).
• Technical Bugs: Frequent technical issues are reported with email sending and LinkedIn scraping features. Users note that customer support often blames them initially before addressing and fixing the bugs (Trustpilot).
• Inaccurate Email Validation: A high percentage of emails deemed "valid" by the system have been reported to bounce back, leading to wasted credits and dissatisfaction with the accuracy of the service (Trustpilot).
• Poor Customer Service: Customer service responses are often negative and unhelpful, especially regarding requests for subscription extensions or adjustments when services are unused (Trustpilot).

10. Kaspr

Kaspr is a newer tool in the B2B data space that focuses on LinkedIn data, allowing users to find and export contact data, including email addresses and contact numbers, directly from LinkedIn profiles with a few clicks.

Top Features

• LinkedIn Data Extraction: This quickly scraps email addresses and contact numbers off LinkedIn profiles.
• Data Enhancement: Kaspr dynamically pulls further contact info from insightful sources like company websites, business directories, and public databases in order to elicit a clearer real-time understanding of your prospect.
• Real-time Verification: Kaspr verifies email addresses in real time to ensure the accuracy of the contact data.
• Chrome Extension: Access Kaspr's features directly from your web browser with the Chrome extension, allowing you to find, verify, and export contact info while browsing LinkedIn profiles without switching tabs. 
• Unlimited Emails: Kaspr offers unlimited email credits across all its plans, making it a suitable choice for businesses needing high-volume email outreach without extra costs per email.

What are some limitations of Kaspr (by G2 reviews)?

• Inaccurate Contact Info: Over 90% of the contact numbers provided are personal or incorrectly assigned, with less than 10% being valid business numbers. Email accuracy is also low, with only around 50% of emails being correct.
• Outdated Information: Some users found their data outdated, with emails linked to companies they had left years prior.
• Cancellation and Pricing Issues: Users report difficulty canceling their monthly plans, with unclear cost structures leading to unexpected charges.
• Tacit Renewal Policy: Kaspr uses a tacit renewal subscription model, leading to disputes over unused credit charges and difficulties terminating services.
• Poor Performance and Value: Users find Kaspr’s services lacking compared to other tools, particularly regarding contact accuracy and overall performance, making the costs seem unjustified.

11. Apollo.io

Apollo.io is also a sales intelligence and engagement tool that offers instant lead scoring to help users decrease the time spent generating and converting leads. It offers a huge B2B contacts and companies database, plus features like email finding, verification, and campaign automation.

Top Features

• Extensive Database: With a database containing more than 270 million contacts and info on over 10 million companies, you can easily create lists of prospects.
• Advanced Search Filters: Apply granular search filters, including industry, company size, role title, location, funding, and technology used, to unearth the right contacts.
• Email Finding and Verification: Using Apollo.io, you can easily bulk validate and identify email addresses that reduce campaign bounce rates.
• Automated Campaigns: Set up personalized email sequences with follow-up reminders so you can stay in touch around the clock.
• Chrome Extension: Access Apollo.io's features directly from your web browser while browsing LinkedIn or other websites.

What are some limitations of Apollo.io?

• Numerous Bugs: Users frequently encounter bugs across the platform, significantly impacting usability and efficiency (G2).
• Poor Customer Support: Customer support is often criticized, with users reporting unresolved access issues, including problems with logging into the platform and accessing key features, even after providing necessary verification (G2).
• Inaccurate Data: The platform's inaccuracies, including incorrect contact details and private information listed as business contacts, can lead to ineffective strategies and potential reputational damage (G2).
• High Costs: Users desire a more flexible subscription structure that adjusts based on actual usage, particularly for fluctuating needs (Gartner).

12. LeadIQ

LeadIQ is a sales intelligence software that captures and enriches leads from anywhere on the web, including LinkedIn, company websites, online directories, and more. It allows businesses to create and grow targeted email campaigns while encouraging seamless integration into their existing, underlying sales processes for enhanced operating productivity.

Top Features:

• Lead Capture: Use the browser extension to capture leads from LinkedIn, company websites, and more.
• Data Enhancement: Fill in the blanks on your leads, like position titles, company information, and social profiles, for a more holistic understanding of exactly who you're trying to engage.
• Mobile App: You can access and manage leads on the fly with LeadIQ's mobile app.
• Integrations: LeadIQ connects with your favorite CRMs and sales engagement platforms like Salesforce, HubSpot, or Outreach.
• Sales Trigger Data: Real-time triggers that indicate the prospect is now in buy mode, like job changes or company expansions.

What are some limitations of LeadIQ?

• High Email Bounce Rates: Despite email validation indicators, users experience high bounce rates, suggesting poor data accuracy (G2).
• Inadequate Data Quality: General data quality is low, with frequent inaccuracies in cell numbers and email addresses (G2).
• Limited Global Scalability: The product's international data quality is lacking, making it difficult to scale globally, with access currently limited to the Americas and EMEA regions (Gartner).
• Missing Leads: LeadIQ often fails to provide contact information for many leads, indicating gaps in its database (Gartner).

13. CloudLead

CloudLead is a B2B data provider that helps you save time and money by creating validated lead lists, which are manually verified and refined using AI-powered tools to ensure maximum accuracy of the information based on industry type, geographic location, or company size.

Top Features

• Human-in-the-Loop Data Verification: It combines human researchers and AI to verify data, guaranteeing accuracy.
• Custom Lead Lists: CloudLead builds custom B2B lead lists that are the perfect fit for criteria like industry, career title, company size, and location to help you reach out to the right customer profile.
• Data Cleansing and Deduplication: Existing data goes through a process where duplicates are immediately removed to increase its quality and accuracy.
• Data Improvement: Add social media profiles, position titles, and company details to enrich your B2B leads.

What are some limitations of CloudLead?

• Limited Contact Database: CloudLead's contact database is smaller than that of its competitors but is gradually expanding (G2).
• Data Refresh Rates: Bounce rates tend to be higher with campaigns because the data refresh rate is inadequate.
• Customization Options: The levels of filtering and sorting that can be applied may be limited, which would impact qualifying specific leads.

14. Adapt.io

Adapt.io is a sales prospecting platform that offers verified contacts with accurate B2B contact data, contact numbers, and email addresses. It provides a robust B2B list with a huge database of contacts and companies and also features rich tools to build targeted lists, enrich data, and manage your marketing campaigns.

Top Features

• Accurate and Verified Data: Their database is regularly updated with the latest information, using real-time data checks to ensure users always have access to current contact details.
• Real-time Data Updates: Adapt.io has a real-time database that is updated on a regular basis so users can get current contact details.
• Advanced Search Filters: Use filters to search for your target contacts, such as industry, company size, job title location, or technology used by the companies.
• Lead Scoring: Adapt.io's lead scoring system helps users identify the most promising leads to prioritize campaign efforts.
• Integrations: Streamline your workflow by connecting Adapt.io to popular customer management tools and sales engagement platforms such as Salesforce, HubSpot, and Outreach.

What are some limitations of Adapt.io (by G2 reviews)?

• Limited Account Options: Adapt does not offer unlimited accounts, and even industry-specific unlimited options are not available, which can be restrictive for users needing large volumes of leads in specific sectors.
• Credit Usage Issues: Users report issues with Adapt.io's credit system, where closing a window prematurely can still consume credits, and promised credits for submitting reviews are not consistently delivered.
• Variable Email Accuracy: The quality of email leads varies, with many not meeting a 75% accuracy threshold, leading to concerns about the reliability of contact data.
• Outdated Information: Numerous contact details, such as email, are obsolete or incorrectly displayed, hindering the campaign’s reach.

15. EasyLeadz

EasyLeadz is a B2B contact data provider that provides human-verified leads, which include email addresses and phone numbers for marketing and sales teams. You get tools like a Chrome extension and custom list-building services to build very targeted email lists based on your preferences.

Top Features

• Custom Lead Lists: EasyLeadz can provide you with custom lead lists based on your specific criteria, targeting the perfect customer profile for better campaigns.
• Human-Verified Data: EasyLeadz cross-checks the obtained data through a combination of human-validation and AI-powered tools, so there are no entry errors in email addresses, contact numbers, or other contact details.
• Mobile Number Extraction: The platform extracts mobile numbers, which you can use to connect with your leads on a more personal level, such as sending SMS messages or any other mobile channel.
• Technology Tracking: EasyLeadz provides visibility into a company's tech stack, looking at the tools in use, such as client relationship management systems or cloud platforms, amongst others, which can help you engage with the lead based on this insight.
• Integrations: Connect with the most popular CRMs and sales digital platforms like Salesforce and HubSpot.

What are some limitations of EasyLeadz (by G2 reviews)?

• Limited Contact Database: EasyLeadz has restricted contacts available, with low credits initially provided for free.
• High Subscription Costs: The platform's subscription fees are higher than those of other demand-generation tools, with users noting that the pricing is unusually high.
• Low Free Credits: There is a shortage of free credits to test-drive the service for an extended period without signing up with credit card info.
• Inadequate Customer Support: Many user reviews suggest EasyLeadz falls short in customer support.

16. DemandScience

DemandScience is an account-based marketing platform that offers B2B brands data-driven solutions for customer generation and sales acceleration. It gives businesses access to a database of contacts and companies and data enhancement, intent monitoring, and audience targeting tools.

Top Features

• Comprehensive Data: DemandScience has a massive database that encompasses contact details and companies, including firmographic, demographic, and behavioral data.
• Intent Data: DemandScience tracks online behavior and buying signals to uncover prospects in active research of your products or services.
• Audience Targeting: Create super target audiences based on criteria like industry, company size, role title, and location.
• Data Improvement: The solution allows customers to improve the data they already have with all of DemandScience's intelligence, including firmographic details such as company size and revenue and technographics like what technologies companies use.
• Integrations: DemandScience is compatible with many leading customer management systems or marketing automation platforms, including Salesforce, HubSpot, and Marketo.

What are some limitations of DemandScience?

• Inaccurate Initial Data: Users reported that the first batch of leads received was often incorrect, leading to delays and additional work to qualify leads, suggesting a need for improved data accuracy (G2).

• Lead Quality Issues: Despite efforts to nurture leads, many users felt the leads provided were no better than purchased data, indicating potential concerns about lead warmth and quality (G2).

• Poor Dashboard and Analytics: Users have noted that the platform needs improvement in its dashboard and analytical capabilities, impacting the ability to evaluate campaign performance effectively (G2).

• Inconsistent Support: There are comments about varying levels of customer support, with some users finding the responsiveness of account managers lacking when they needed assistance or had queries (Trustradius).

• Incomplete Lead Delivery: There were complaints regarding lead reports lacking essential information, which hindered effective follow-up and engagement (Trustradius).

• High Cost: A few users said that while the leads are qualified, they can be too expensive, so affordability is a question with those costs versus ROI (G2).

17. RocketReach

RocketReach is an email finding and contact enrichment service that lets you easily connect with the decision-makers at your desired companies. It allows you to research specific individual emails or even generates millions of company email addresses. All data is provided from a professional contact database.

Top Features

• Extensive Database: RocketReach has a Large database of contact data, verified email addresses, phone details, and social media profiles.
• Advanced Search: Use advanced search filters such as industry, company size, role title, and geography to find the most relevant contacts.
• Email Verification: Clean your email list, ensure deliverability, and reduce bounce rates.
• Bulk Lookups: Allows users to search for and validate email addresses in bulk.
• Chrome Extension: Access RocketReach's features directly from your web browser while browsing LinkedIn or other websites.

What are some limitations of RocketReach?

• Misleading Information: Users report feeling misled by claims regarding RocketReach’s capabilities and the accuracy of its contact data, leading to dissatisfaction and concerns about wasted investment (Gartner).
• Poor Customer Service: There are frequent complaints about difficult interactions with customer service, including trouble with canceling services (G2).
• Personal Email Addresses: RocketReach sometimes provides personal email addresses for prospects, which may not be appropriate or effective for professional outreach campaigns targeting specific markets (Gartner).
• Inaccurate Contact Details: Users have noted that contact info, such as contact details, is mostly incorrect, leading to operational inefficiencies (G2).

18. AeroLeads

AeroLeads is a lead generation and prospecting software that helps businesses find their prospects' emails and contact numbers so they can reach out with relevant messages. It offers a Chrome extension for capturing leads from sources like LinkedIn and Crunchbase.

Top Features

• Lead Capture: One can capture leads from LinkedIn, Craigslist, and other online sources with the help of a Chrome Extension.
• Email Finding and Verification: Validate and search for email addresses to ensure they are correct and deliverable.
• Data Enrichment: Enrich your leads with position titles, company details, or social media profiles.
• Export Data: Export your leads to CSV or integrate with popular CRMs.
• Affordable Pricing: AeroLeads has a freemium model and various plans that could suit the needs of smaller and larger businesses.

What are some limitations of AeroLeads?

• Limited Data in Demos: The demo version does not include full features such as phone number access, leading to incomplete testing of the platform's capabilities before purchase (G2).
• Inadequate Database for Phone Numbers: Even after full access, the database is reported to have limited contact numbers, reducing its usefulness for users needing comprehensive contact details (G2).
• Incomplete Prospect Lists: Some users receive incomplete prospect lists, with missing email addresses and no phone details, which do not align with product promises (Capterra).

19. VisitorQueue

VisitorQueue is a B2B website visitor identification tool showing you which companies visit your site and what pages they interact with. It will also help identify new leads from businesses looking at your product or solution.

Top Features

• Website Visitor Identification: Discover organizations that visit your site, even if they never submit a form.
• Lead Scoring: Let VisitorQueue help you prioritize your campaigns with lead scoring to determine the highest quality leads.
• Contact Information: The tool provides email addresses, phone details, and other data from key decision-makers at a company that went to your website.
• Integrations: VisitorQueue integrates with third-party tools like HubSpot and Salesforce.
• Real-time Alerts: Get real-time notifications when prospective high-value leads land on your site.

What are some limitations of VisitorQueue (by G2 reviews)?

• Limited LinkedIn Integration: Users report that the tool lacks functionality for syncing or updating LinkedIn accounts of identified contacts, which could improve its overall utility.
• Inadequate Customer Support: Users have complained that there is only an email form for customer support and no live chat or phone help options, so problems may take a long time to resolve.
• Challenges with Account Management: Problems such as adding users, account deletions, and accessing new leads after upgrading are commonly reported.
• Limited Utility for Low Traffic Sites: The tool may not provide significant value for websites with minimal traffic, especially if the same few companies are repeatedly identified.

20. Medicoleads

Medicoleads is a B2B healthcare data provider providing medical professional and healthcare organization-related email lists that have been validated. They cater to businesses endeavoring to reach a specialized audience in the healthcare sector, such as pharmaceutical companies and medical device manufacturers, and they are also useful to healthcare marketers.

Top Features

• Healthcare-Specific Data: If you have a need related to healthcare email lists, Medicoleads focuses only on the healthcare industry with a database of physicians, nurses, hospital administrators, and more.
• Targeted Lists: Create custom contact lists based on medical specialty, title, location, or hospital affiliation with high accuracy.
• Data Accuracy: Medicoleads goes to lengths in manually verifying contact information, including names, email addresses, and phone numbers.
• Compliance: The platform follows healthcare data privacy regulations, such as HIPAA, ensuring your campaign complies with privacy regulations.
• Data Improvement: Medicoleads appends contact data with critical details like medical licenses and board certifications affiliations.

What are some limitations of Medicoleads?

• Data Accuracy and Completeness: Users encountered inaccurate contact information, essential for effective medical campaigns and engagement.
• Scope of Database: The database may not have specialized coverage or reach the entire country, so some medical providers and regions could be left out.
• User Interface and Usability: The platform has a clunky or non-intuitive user interface, making it hard for the less tech-savvy workers in medical practices to use.

CIENCE – The Best Email List Provider for B2B Companies

In the current B2B market environment, being competitive is synonymous with precision and timing. CIENCE further piles on its superior database and extensive intent data with proprietary MemoryAI to target the right prospects better than anyone. Whether you hunt for hidden opportunities, strategize to have the edge over others, or optimize your marketing ROI, the CIENCE approach works with 100% precision, engaging enriched leads at the right time.

Take the guesswork out of your lead generation and see how well CIENCE works for yourself. Reach out to see how CIENCE can empower your B2B demand generation efforts for faster business expansion.

Frequently Asked Questions about B2B Email Lists

Why should you invest in a B2B email list?

Buying a B2B email-for-sale list has several benefits: it can help you in fast client generation, improve engagement rates, and better targeting that directly gets more business for you.

• Jumpstart your outreach: Start reaching out to a broad new audience of leads immediately, which helps get as many people interested in talking with you about being clients as possible.
• Enhance your organic list growth: Improve your demand generation by bringing new contacts into the top end of the funnel, which will aid in greater opportunity for more leads to convert to customers.
• Target niche markets: Access narrowly defined targets that you would struggle to reach organically so you can speak directly with the right decision-makers in more specialized industries
• Run time-sensitive campaigns: You can produce your material rapidly for the best individuals and have it land on their screens at exactly the right time for optimum interaction.
• Explore new markets: It allows you to try tests with different verticals and customer segments, giving your business access to spread its wings into unexplored territories.

How to choose the best source to purchase email lists?

Selecting the right partner ensures you have access to current B2B contact lists that are of high quality for your campaign success and give proven results at an affordable investment. So, when it comes to selecting the best B2B email data provider that helps you to be efficient and precise in your campaign campaign, here are the things to consider:

• Data accuracy: Choosing higher-level providers gives you a better chance of reaching the contacts inside your database when many platforms offer false data and waste campaign efforts.
• Compliance: Ensure compliance with data privacy regulations such as GDPR and CCPA to avoid getting sued and creating zero trust with your business through marketing efforts.
• Targeting options: Higher conversion rates come from better targeting, so you should be able to filter and segment with a certain level of detail.
• Data quality: Select a complete dataset, including the job titles, company details, and other information needed for more targeted messaging.
• Pricing: Verify costs to ensure you pay the right cost for your investment without compromising data quality.
• Reputation and reviews: Check out customer feedback and reviews to ensure the company you are about to partner with is reliable and fulfills exactly what they offer.
• Customer support: The service should provide good customer support so you can resolve issues quickly and bring your campaign back into normal motion.

What’s the cost of buying an email list?

The cost of buying an email list depends on several factors, including data quality, list size, and targeting precision:

• Cost per contact: From $0.10 to $1 or more, the cost per contact will depend entirely on the quality or specificity of the data you are purchasing, so there is no exact figure here.
• CPM (Cost Per Mille/Thousand): With consumer lists usually costing around $100-400, business lists can range between $300-$1,000.
• Subscription models: A few providers offer new email databases through time-based, automatic renewals of subscriptions.