ZoomInfo
9.1What it is: The enterprise standard for B2B contact and intent data, built on a much larger and more frequently verified data pipeline than Apollo's. Adds org charts, intent signals, and website visitor identification on top of the core database.
Why it's on this list: When Apollo's data quality is the actual complaint, ZoomInfo is the upgrade path — it's simply more accurate at scale, especially on direct dials and mid-market/enterprise accounts.
How it beats Apollo.io: Data accuracy and depth. ZoomInfo's verification cadence and intent data are meaningfully ahead of Apollo's.
Pricing: No public pricing — custom quotes typically start around $15,000/year, billed annually, seat-based.