waterfall-enrichment

Cascade one lookup through several vendors in priority order, so a row the first source misses falls through to the next instead of being lost, powered by Cargo. Triggers: "waterfall enrichment", "cascade through providers", "fallback chain", "my single vendor has bad coverage", "try another source when the first one misses", "improve my match rate", "multi-vendor fallback". Providers: waterfall. Skip when: you want one address for one name and domain — use find-work-email, the cheaper single job; or you hold addresses and only want them checked — use verify-email-list.