Where to actually find contacts for outbound

Apollo and ZoomInfo cover broad contact databases with built-in filtering; Clay sits a layer above as an enrichment/orchestration tool that waterfalls a single contact through several data providers to improve match rate; Lusha is a lighter option for smaller lists. Pick based on list size and budget, not brand recognition — a 95% accurate list of 200 beats a 60% accurate list of 5,000.