When reaching a hard list matters more than the cost per record, FullEnrich is the enrichment layer we pull in. It is a waterfall platform that cascades one lookup through 15-plus data sources in sequence and returns the first verified match it finds. If the first provider misses, it tries the next, covering work emails, personal emails, and mobile numbers. You only spend credits when the waterfall actually returns data, so every miss and dead number is free. We use it after list-building and just before sending, filling the contact gaps any single provider leaves behind and raising the share of prospects you can actually reach. It plugs cleanly into Clay, HubSpot, Salesforce, and a straightforward API. We run FullEnrich inside client enrichment waterfalls when coverage on a tough segment is the priority. Stacking many providers behind one call lifts our reachable rate, and paying only for verified hits keeps the spend honest and easy to defend. Because it resells other providers, the cost per record can run above a direct single-source tool, and mobile numbers cost ten credits each, so phone-heavy lists burn through allowances fast. Hit rates also dip on smaller non-US segments where the underlying data is thin.