Details
PricingPaid
Category: Data Enrichment & Intelligence
OSS Maturity:Weak
Build note: Combine SpiderFoot for OSINT automation with custom enrichment pipelines. No single OSS matches Clearbit/ZoomInfo breadth.
Gap:B2B contact databases are inherently commercial. OSS tools focus on OSINT collection rather than structured enrichment.
More in Data Enrichment & Intelligence
AmassOpen Source
Attack surface mapping and asset discovery; Apache 2.0
Apollo.ioCommercial
Contact database + engagement; generous free tier
ClayCommercial
Waterfall enrichment; combines 75+ data providers
clearbitPackage
Clearbit enrichment API client
Clearbit (HubSpot)Commercial
Real-time company and contact enrichment; acquired by HubSpot
holehePackage
Check if email is used on different sites
Maltego CEOpen Source
OSINT and graphical link analysis; community edition free
People Data LabsCommercial
Developer-first person and company data API