best b2b data providers
Best B2B Data Providers
Best B2B Data Providers 2026 (Honest Comparison)
Bad data = wasted campaigns. Here are the 7 B2B data providers we've tested — ranked by accuracy, coverage, and value.
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You can have perfect emails, flawless infrastructure, and a killer offer.
None of it matters if you're emailing the wrong people.
Data quality is the foundation. Here's where to get it.
How We Evaluated
Four factors:
Accuracy — What % of emails are valid?
Coverage — How many contacts in your ICP?
Freshness — How often is data updated?
Value — Cost per usable contact
The 7 Best B2B Data Providers
1. Apollo — Best All-Around
Price: Free tier | $49/mo (basic) | $99/mo (pro)
Database: 275M+ contacts
Our take: Best starting point for most teams. The free tier is generous. Data quality is solid for the price.
2. ZoomInfo — Best for Enterprise
Price: $15K+/year (enterprise pricing)
Database: 100M+ contacts with deep firmographics
Our take: Premium data, premium price. Worth it if you're doing enterprise sales with big deal sizes.
3. Clay — Best for Enrichment
Price: $149/mo (starter) | $349/mo (explorer)
What it does: Waterfall enrichment across 50+ data sources
Our take: We use Clay for every client. It's not a database — it's a data layer that makes other sources better.
4. Cognism — Best for EMEA
Price: Custom (typically $1K+/mo)
Database: Strong European coverage, phone-verified mobiles
Our take: If you're targeting Europe, Cognism has data others don't.
5. Lusha — Best for Quick Lookups
Price: Free tier | $29/mo (pro)
What it does: Chrome extension for LinkedIn prospecting
Our take: Great for sales reps doing manual prospecting. Not built for bulk operations.
6. RocketReach — Best Email Coverage
Price: $53/mo (essentials) | $179/mo (pro)
Database: 700M+ profiles claimed
Our take: Good supplementary source. We use it when Apollo comes up empty.
7. BuiltWith + Store Leads — Best for Tech Targeting
Price: Varies by use case
What it does: Find companies using specific technologies
Our take: Perfect for SaaS targeting. "Companies using Salesforce" is more valuable than generic firmographics.
The BuzzLead Data Stack
What we actually use:
Apollo — Primary source for contacts
Clay — Enrichment layer (waterfall across sources)
LinkedIn Sales Nav — Manual verification + company research
NeverBounce + MillionVerifier — Email verification
This stack gives us 85%+ email accuracy for clients.
FAQ
Which data provider is most accurate?
ZoomInfo for enterprise, Apollo for SMB. But always verify — no provider is 100% accurate.
How much should I budget for data?
$100-500/month for most B2B teams. Enterprise sales may need $1K+/month for premium sources.
Can I use multiple providers?
Yes, and you should. Waterfall enrichment (trying multiple sources) catches what single sources miss.
How do I know if data is fresh?
Check job change dates. If contacts show roles from 2+ years ago, the data is stale.