Clearbit API
B2B data enrichment platform API that provides company and person intelligence from email addresses or domain names, used for lead enrichment and qualification.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
B2B data enrichment API (now HubSpot Data Enrichment). API key auth. Contains PII (company + contact data) — GDPR/CCPA compliance required. Webhook secrets for real-time events.
⚡ Reliability
Best When
Your agent needs to enrich B2B leads with company firmographics, technographics, and contact data to qualify or route them.
Avoid When
You need consumer data, non-North American/European company data, or are on a tight budget.
Use Cases
- • Enriching lead records with company data in CRM automation agents
- • Qualifying leads by company size, industry, and technology stack
- • Identifying website visitors via IP-to-company matching
- • Building firmographic data for sales outreach targeting
- • Deduplicating and normalizing company data in pipelines
Not For
- • Consumer data enrichment (B2B focused only)
- • Real-time person background checks
- • Teams outside North America/Europe (data coverage varies)
Interface
Authentication
API key via HTTP Basic Auth (key as username, empty password). Simple but credential must be protected.
Pricing
Now owned by HubSpot (acquired 2023). Pricing has changed. Some features bundled into HubSpot. Primarily enterprise-focused now.
Agent Metadata
Known Gotchas
- ⚠ Acquired by HubSpot in 2023 - API still works but future direction uncertain
- ⚠ Returns 202 for async enrichment when data isn't cached - agents need webhook to receive results
- ⚠ Data freshness varies - some company records may be months old
- ⚠ GDPR compliance requires careful handling of European person data enrichment
- ⚠ Not all email addresses map to enrichment results - agents must handle empty/null responses
Alternatives
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Scores are editorial opinions as of 2026-03-07.