No single data provider has complete coverage. Apollo might have a contact’s job title but no verified email. Findymail might find the email but miss the phone number. Waterfall enrichment solves this by running every contact through multiple providers in a defined sequence, rather than accepting whatever gaps one tool leaves behind.
The Waterfall Sequence
- Findymail checked first, typically the highest match-rate provider for direct verified emails
- Prospeo checked second for any contact Findymail could not resolve
- Apollo used as a third-layer fallback, plus as the source of firmographic and role data throughout
- Each layer only runs on contacts the previous layer could not fully resolve, keeping enrichment costs proportional to actual need
Built and Run Through Clay
The waterfall logic itself is built and orchestrated in Clay, which lets us chain these providers together with fallback rules, deduplicate results automatically, and output a single clean record per contact rather than a spreadsheet of three overlapping partial matches.
Match Rate Impact
A single-provider search typically resolves 60 to 75% of a target list to a verified email. The same list run through a three-provider waterfall typically resolves 90 to 97%, meaning your list size effectively grows without changing your ICP criteria at all.
What You Receive
A single enriched record per contact: verified email, name, title, company, LinkedIn URL, and firmographic data, with the source provider noted for full transparency into where each data point came from.