ZoomInfo
ZoomInfo is the data incumbent that built the enterprise B2B contact and company database category, went public on Nasdaq in 2020 (ticker ZI; GTM since May 13, 2025), and has spent the years since defending its position from Apollo’s aggressive PLG expansion and Clay’s waterfall enrichment architecture. The company acquired Chorus.ai in 2021 for $575M to add conversation intelligence, and has continued building toward a full go-to-market platform. As of April 2026, ZoomInfo has the deepest enterprise data asset in the category — particularly for direct dials and intent signals at the Fortune-5000 level — but its price-to-value ratio versus Apollo has never been harder to justify for companies under $100M in revenue.