The best data enrichment tools in 2026 are no longer single-source databases. Waterfall enrichment across 150+ providers now hits 78% email match rates versus 42% for Apollo standalone. Clay, Apollo, ZoomInfo, Clearbit (Breeze Intelligence), and Lusha each solve a different problem at a different price point. Clay starts at $167/month. ZoomInfo starts at $15,000/year. One of them is right for your stack. None of them is the right default.