Clay48 customers
Used by 48 companies on usedby. 4 also use Apollo. Compare Apollo and Clay
Source: clay.com, latest capture Oct 5, 2026.
7 of the 71 Apollo customers on usedby also use another tool on this list. The tools most often used by the same companies are Clay (4 shared, 48 customers in all), Common Room (2 shared, 68 customers in all), and ZoomInfo (2 shared, 67 customers in all).Latest check Oct 8, 2026: 395 of 412 public lines checked. Customer counts include every proof level, job-post signals included. Shared customers are counted on confirmed or observed lines on both tools.
7of 71
Apollo customers also use another tool on this list
Clay shares the most companies with Apollo: 4 companies use both.
Ranked by shared customers
Tools of the same or a competing category, from another vendor, used by at least one company that also uses Apollo. A shared customer has a confirmed or observed line on both tools.
| # | Alternative | Shared with Apollo | Customers | Compare |
|---|---|---|---|---|
| 1 | Clay | 4 | 48 | Compare Apollo vs Clay |
| 2 |  Common RoomMostly DevTools & Infrastructure (26) | 2 | 68 | Compare Apollo vs Common Room |
| 3 |  ZoomInfo | 2 | 67 | Compare Apollo vs ZoomInfo |
| 4 |  UserGemsMostly Marketing Tech (4) | 2 | 25 | Compare Apollo vs UserGems |
| 5 |  6sense | 1 | 32 | Compare Apollo vs 6sense |
Common Room68 customers
Used by 68 companies on usedby, 26 of them in DevTools & Infrastructure. 2 also use Apollo. Compare Apollo and Common Room
Source: commonroom.io, latest capture Oct 7, 2026.
ZoomInfo67 customers
Used by 67 companies on usedby. 2 also use Apollo. Compare Apollo and ZoomInfo
Latest capture across its sources: Oct 8, 2026.
UserGems25 customers
Used by 25 companies on usedby, 4 of them in Marketing Tech. 2 also use Apollo. Compare Apollo and UserGems
Source: usergems.com, latest capture Oct 8, 2026.
6sense32 customers
Used by 32 companies on usedby. 1 also uses Apollo. Compare Apollo and 6sense
Source: 6sense.com, latest capture Oct 5, 2026.
Other Sales Prospecting & Enrichment tools on usedby
Same category, with public customers, but no company named with Apollo yet.
Switch signals
A company that left one vendor's page and appeared on another's.
No switch publishedA switch needs a departure from one vendor's page, seen on two checks in a row, and a dated arrival on another. usedby does not publish departures yet, so no switch shows here.
By industry
Which of these tools the companies on usedby use, by industry. Each row counts the companies of that industry on usedby that use at least one of these tools.
| Industry | Most used | Next | Companies |
|---|---|---|---|
| DevTools & Infrastructure | Common Room70% | Clay14% | 37 companies |
| Marketing Tech | Clay32% | ZoomInfo27% | 22 companies |
| Data & Analytics | Common Room75% | 6sense15% | 20 companies |
| HR & Recruiting |  Apollo40% | ZoomInfo33% | 15 companies |
| Cybersecurity | Common Room36% | Clay29% | 14 companies |
Read the first row as: among the 37 DevTools & Infrastructure companies on usedby that use one of these tools, 70% use Common Room. Shares can add up to more than 100% because some companies use two tools.
Questions about Apollo alternatives
Which tool shares the most customers with Apollo?
Clay: 4 companies use both on usedby. Clay has 48 customers in all. See who uses Clay.
Do Apollo customers use other tools too?
7 of the 71 Apollo customers on usedby also use another tool on this list. Clay shares the most: 4.
Which of Apollo and its alternatives do DevTools & Infrastructure companies on usedby use?
Among the 37 DevTools & Infrastructure companies on usedby that use one of these tools, 70% use Common Room. Clay comes next, with 14%.
Which of Apollo and its alternatives do Marketing Tech companies on usedby use?
Among the 22 Marketing Tech companies on usedby that use one of these tools, 32% use Clay. ZoomInfo comes next, with 27%.
How does usedby rank Apollo alternatives?
Only tools of the same or a competing category, from another vendor, count. They are ranked by shared customers: companies with a confirmed or observed line on both tools, from public pages, most with a dated capture. Tools with no shared customer are listed apart. Customer counts include every proof level, job-post signals included.