Apollo vs UserGems: who uses which
Customers, public proof and the companies that use both.
On usedby, 71 companies use Apollo and 25 use UserGems. 2 companies use both, including Accord and Smartling. Apollo leads among the HR & Recruiting companies on usedby that use either tool, UserGems among the Marketing Tech companies.Latest check Oct 8, 2026: 96 of 96 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, UserGems, or both
Every company with a public proof for at least one of the two tools.
69
use only Apollo
2
companies use both
23
use only UserGems
69 companies use only Apollo, 23 use only UserGems and 2 use both, out of the 94 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 |
|---|---|
 Accord | On or before May 2026 |
 Smartling | On or before Nov 2024 |
By industry
Which tool the companies on usedby use, by industry. Shares of the companies on usedby that use Apollo, UserGems or both: a share of the companies on usedby, not of the market.
Apollo onlyBothUserGems only
More common with Apollo
- HR & Recruiting6 of the 6 HR & Recruiting companies on usedby that use either tool use Apollo.
More common with UserGems
- Marketing Tech4 of the 7 Marketing Tech companies on usedby that use either tool use UserGems.
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.
ApolloUserGemsWhat customers report
Results as the vendor or the customer published them, with the source and the date.
Apollo
No reviewed story for Apollo yet.
UserGems
generated 276 sales opportunities worth over $18M in new business pipeline
Mimecast
Vendor case study, usergems.com, captured Oct 8, 2026
50-60% 50–60% of outbound meetings come from UserGems signals & Gem-E.
Accord
Vendor case study, usergems.com, captured Oct 8, 2026
Questions about Apollo and UserGems
Which is used more, Apollo or UserGems?
Apollo has more customers on usedby: 71 against 25 for UserGems. Apollo leads among the HR & Recruiting companies on usedby that use either tool, UserGems among the Marketing Tech companies.
Do companies use both Apollo and UserGems?
Yes. 2 companies use both on usedby, including Accord and Smartling.
Who uses Apollo?
71 companies on usedby, each with the public page that shows it. See who uses Apollo.
Who uses UserGems?
25 companies on usedby, each with the public page that shows it. See who uses UserGems.
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.