How to waterfall enrich HubSpot contacts across Apollo, Clearbit, and People Data Labs

Why waterfall enrichment?

No single data provider has complete coverage. Apollo might find 70% of your contacts, but miss the other 30%. By chaining multiple providers in a waterfall — trying each one in sequence and only calling the next for missing fields — you maximize data coverage while minimizing API spend.

This is the #1 most-discussed enrichment pattern in RevOps communities, and it's how the best sales teams maintain 90%+ enrichment rates.

What you'll need

How the waterfall works

1. New contact enters HubSpot (or batch of contacts to re-enrich)
2. Call Apollo People Enrichment with the contact's email
3. Check which fields are still missing (title? company? phone?)
4. For missing fields, call Clearbit Enrichment
5. For any remaining gaps, call People Data Labs
6. Write all enriched data back to HubSpot with source attribution

Choose your approach

Select an approach below to see the full step-by-step guide.