Apollo vs ZoomInfo: who uses which
Customers, public proof and the companies that use both.
On usedby, 71 companies use Apollo and 67 use ZoomInfo. 2 companies use both, including Google and Snowflake. Apollo leads among the HR & Recruiting companies on usedby that use either tool, ZoomInfo among the Marketing Tech companies.Latest check Oct 8, 2026: 138 of 138 public lines checked. Counts include every proof level, job-post signals included. Companies named on both have a confirmed or observed line on each side.
Who uses Apollo, ZoomInfo, or both
Every company with a public proof for at least one of the two tools.
69
use only Apollo
2
companies use both
65
use only ZoomInfo
69 companies use only Apollo, 65 use only ZoomInfo and 2 use both, out of the 136 companies on usedby that use at least one of them.
Where it lands
Newest customers
No new customer since tracking started on October 4, 2026.
Where it lands
Newest customers
No new customer since tracking started on October 8, 2026.
Who uses both
Companies with a confirmed or observed line on both tools.
| Company | First public proof, Apollo |
|---|---|
 Google | On or before Nov 2024 |
 Snowflake | On or before Aug 2026 |
By industry
Which tool the companies on usedby use, by industry. Shares of the companies on usedby that use Apollo, ZoomInfo or both: a share of the companies on usedby, not of the market.
Apollo onlyBothZoomInfo only
More common with Apollo
- HR & Recruiting6 of the 11 HR & Recruiting companies on usedby that use either tool use Apollo.
- DevTools & Infrastructure3 of the 5 DevTools & Infrastructure companies on usedby that use either tool use Apollo.
More common with ZoomInfo
- Marketing Tech6 of the 9 Marketing Tech companies on usedby that use either tool use ZoomInfo.
Source: confirmed and observed usedby lines. Job-post signals, the weakest proof level, are left out of these shares.
Side by side
Facts from our data and from each vendor's public pages. Each line says where it comes from.
ApolloZoomInfoWhat customers report
Results as the vendor or the customer published them, with the source and the date.
Apollo
No reviewed story for Apollo yet.
ZoomInfo
Annual revenue is up by more than 1900%
Deal IQ
Vendor case study, zoominfo.com, published Jul 29, 2025
4X faster program launch: what previously took nearly four months for 8 teams now takes just one month for 22 teams.
monday.com
Vendor case study, zoominfo.com, published Apr 29, 2026
Questions about Apollo and ZoomInfo
Which is used more, Apollo or ZoomInfo?
Apollo has more customers on usedby: 71 against 67 for ZoomInfo. Apollo leads among the HR & Recruiting companies on usedby that use either tool, ZoomInfo among the Marketing Tech companies.
Do companies use both Apollo and ZoomInfo?
Yes. 2 companies use both on usedby, including Google and Snowflake.
Who uses Apollo?
71 companies on usedby, each with the public page that shows it. See who uses Apollo.
Who uses ZoomInfo?
67 companies on usedby, each with the public page that shows it. See who uses ZoomInfo.
How does usedby count customers?
A company counts when a public page shows it: a vendor's customer page, a case study, a press release or a job post, most saved with a dated capture. Every line is a customer, at one of three proof levels: confirmed, observed or signal (a job post, the weakest). A company is named as using both tools when its lines on both are confirmed or observed.