ZoomInfo vs Apollo.io vs Cognism: 11 Best B2B Data Providers & Contact Databases 2026

Best for Needing the largest possible dataset

ZoomInfo (#1, 9.2/9.4). The market leader with the largest database and strongest intent data features, best for well-funded enterprise teams. It also handles Enterprise-level intent data, Deep company hierarchy mapping.

Best for Budget constraints

Apollo.io (#2, 9.0/9.4). Unbeatable value, combining a huge database with sales engagement tools. Perfect for startups and SMBs. It also handles Needing an all-in-one prospecting tool, Scaling a startup sales team.

Best for GDPR compliance for EU prospecting

Cognism (#3, 8.8/9.4). The leader in GDPR-compliant European data, with excellent human-verified mobile numbers for direct outreach. It also handles Finding verified mobile numbers, UK and EMEA market focus.

What is a B2B Data Provider?

A B2B data provider is a company that compiles and sells information about businesses and their employees. This data includes contact details like emails and phone numbers, firmographics like company size and industry, technographics showing what software they use, and intent data indicating buying signals.

How is Data Accuracy Measured?

Data accuracy is typically measured by email bounce rates and phone connection rates. Top providers claim 90-95% accuracy, often maintained through a combination of AI validation, human verification teams, and real-time checks. However, buyers should always expect some data decay, as people change jobs frequently.

What's the Difference Between Contact Data and Intent Data?

Contact data tells you *who* to reach (e.g., Jane Doe, VP of Marketing at Acme Inc.). Intent data tells you *when* to reach them by tracking online research activities that suggest a company is actively looking for a solution like yours, such as reading specific articles or visiting competitor websites.

How to choose

1. 1First, define your primary market's geography; choose a provider like Cognism for strong EU coverage or ZoomInfo for North America.
2. 2Next, assess your budget. Apollo.io offers a powerful free tier and affordable plans for startups, while platforms like 6sense are priced for enterprise teams.
3. 3Then, evaluate your workflow needs. Ensure the provider has a reliable Chrome extension and deep, bi-directional sync with your specific CRM (e.g., Salesforce, HubSpot).
4. 4Finally, request a data sample for your target accounts. Test the accuracy of the emails and mobile numbers provided before committing to an annual contract.

What is the best B2B data provider for startups?

Apollo.io is widely considered the best B2B data provider for startups. It offers a generous free tier, affordable paid plans, and combines a large contact database with sales engagement tools, providing an all-in-one solution for small, budget-conscious teams.

Are B2B contact databases legal?

Yes, B2B contact databases are generally legal, but they must comply with data privacy regulations like GDPR in Europe and CCPA in California. Reputable providers take compliance seriously, offering features like do-not-call lists and processing data under legitimate interest for B2B marketing.

How much do B2B data providers cost?

Prices vary widely, from free tiers to over $100,000 per year. Per-user plans can range from $49 to $200 per month, like those from Lusha or Uplead. Enterprise platforms like ZoomInfo or 6sense require custom quotes and often start around $15,000 to $30,000 annually for a small team.

Can I get mobile phone numbers from these providers?

Yes, most top B2B data providers offer mobile numbers (direct dials). Providers like Cognism and Lusha built their reputations on the quality of their mobile data, which is often harder to source and verify than email addresses.