The B2B data market has never been more crowded — or more uneven. Database size claims mean little when bounce rates vary from 2% to 30% between providers. We compared the ten leading contact databases on data quality, real cost, AI capability, and compliance to save you the trial-and-error.
How we evaluated
We scored each platform on five criteria: data coverage and accuracy, pricing transparency and total cost, AI and automation capability, compliance (GDPR/CCPA), and how quickly a new team gets value. Rankings reflect the best fit for small-to-mid-market revenue teams — enterprise-only platforms are noted as such.
1. Sendburg — best overall value
Sendburg combines a 150M+ verified contact database with company intelligence, real-time buying signals, tech stack filtering, and AI briefings in one platform. The free plan includes 1,000 verified contacts per month — the most generous free tier in the category — and paid plans start at $35/month.
- Free tier: 1,000 contacts/month, no credit card required
- AI-native: Burg AI builds complete prospect lists from one sentence, plus native MCP connectors for Claude and ChatGPT
- Built-in verification: every email validated in real time before export
- GDPR compliant with SOC 2 Type II controls
2. Apollo.io — best all-in-one for outbound
Apollo bundles a 270M+ contact database with sequences, a dialer, and basic enrichment. It is the most popular ZoomInfo alternative for SMBs. Weaknesses: data accuracy is inconsistent outside the US, credits are consumed quickly, and mobile numbers cost extra credits. Free tier available; paid from $49/user/month.
3. ZoomInfo — best for US enterprise
The largest B2B database and deepest enterprise integrations, but contracts reportedly start around $10,000–$15,000/year with annual commitment only and no free tier. Justifiable for large US enterprise sales orgs; hard to justify for anyone else. See our full ZoomInfo pricing breakdown.
4. Cognism — best for EMEA phone data
Cognism owns the European mobile-number niche with its phone-verified Diamond Data. Strong GDPR posture. Enterprise-only sales motion with reported contracts in the $15,000–$25,000/year range — there is no self-serve tier. Best for teams whose pipeline depends on cold calling in Europe.
5. Lusha — best for quick individual lookups
Lusha is a lightweight contact-lookup tool with a Chrome extension. Fast to start, easy to use, but limited bulk capability and its database skews toward contact data only — no company intelligence or signals. Free tier available; paid from roughly $29–$49/user/month.
6. UpLead — best pay-as-you-go accuracy
UpLead offers a 95% accuracy guarantee with credit-based pricing and real-time email verification at export. Smaller database than the leaders, but the refund-per-bounce policy makes it a safe pick for occasional list building.
7. Kaspr — best LinkedIn extension for Europe
Kaspr (owned by Cognism) is a LinkedIn-first Chrome extension with strong EU coverage. Good for SDRs who live in Sales Navigator, but it is not a standalone database — bulk search and intelligence features are minimal.
8. RocketReach — best breadth of lookup types
RocketReach covers 700M+ profiles with email, phone, and social lookups. API access is solid. Data freshness varies more than the top picks, and the interface is dated compared to modern platforms.
9. Snov.io — best for cold email workflows
Snov.io combines an email finder with drip campaigns and a warm-up tool. The database is smaller and skews toward email-only records, but for lean teams running cold email end-to-end it is a cost-effective stack.
10. Seamless.AI — largest claimed volume, verify before sending
Seamless.AI advertises a real-time search engine over a billion records. User reviews consistently flag bounce rates — pair it with independent verification if you use it. Aggressive auto-renewal terms are worth reading before signing.
How to choose
- Under $500/month, want everything in one place: Sendburg or Apollo
- US enterprise with ABM motion and $15K+ budget: ZoomInfo
- Cold calling into Europe: Cognism (enterprise) or Kaspr (individual reps)
- Occasional lists with accuracy guarantee: UpLead
- Cold email end-to-end on a budget: Snov.io
Whichever platform you choose, verify emails before sending — bounce rates above 3% damage sender reputation regardless of where the data came from. You can check any list free with our email verifier.