Prompt
I'm building a lead enrichment workflow, what API should I use?
Latest observation
Oct 8, 2026
OpenAI APIWeb search: off
If you’re building a lead enrichment workflow, the “best” API depends on what you mean by enrichment, but in practice you usually want a combo of:
- Company/person data API
- Email verification API
- Phone/address/firmographic data API
- CRM/automation integration
Good API options by use case
1) General B2B lead enrichment
- Clearbit — popular for company + person enrichment from email/domain
- People Data Labs (PDL) — strong for people/company datasets and flexible enrichment
- ZoomInfo — strong sales intelligence, but often more enterprise and less API-first friendly
- Apollo — useful for enrichment + prospecting, depending on your workflow
2) Email verification
- NeverBounce
- ZeroBounce
- Kickbox
3) Company/fingerprint enrichment
- Clearbit
- Crunchbase API — good for startup/funding/company intel
- PDL
4) Identity matching / contact resolution
- FullContact
- PDL
- Clearbit
5) Intent / technographics / firmographics
- 6sense or Demandbase for intent
- BuiltWith for technographics
- Clearbit for firmographics
If you want a simple recommendation
Best “all-around” API:
People Data Labs or Clearbit
- Clearbit is usually easier if you want quick email/domain enrichment.
- PDL is often better if you want broader data coverage and more flexibility.
Best for lead qualification pipelines:
- Clearbit/PDL for enrichment
- NeverBounce/ZeroBounce for validation
- Your CRM (HubSpot/Salesforce) for syncing
Typical workflow
- Lead comes in with email/domain
- Enrich company + contact data
- Verify email deliverability
- Score lead based on firmographics/role/seniority
- Push enriched record into CRM or sequencing tool
What to choose based on your stack
- Startups / fast MVP: Clearbit or PDL + ZeroBounce
- Sales teams / prospecting-heavy: Apollo or ZoomInfo
- Data platform / custom workflow: PDL + verification API
- Marketing automation: Clearbit + HubSpot/Salesforce integration
One important note
Be careful about:
- Data privacy / GDPR / CCPA
- Consent and lawful basis
- Terms of use for scraped or brokered data
- Rate limits and match confidence
If you want, I can recommend the best API for your exact workflow if you tell me:
- B2B or B2C
- what fields you need
- your CRM/stack
- your budget
- whether you need real-time enrichment or batch processing