Sardine32 customers
Used by 32 companies on usedby, 6 of them in Fintech & Payments. 3 also use Unit21. Compare Unit21 and Sardine
Source: sardine.ai, latest capture Oct 8, 2026.
4 of the 40 Unit21 customers on usedby also use another tool on this list. The tools most often used by the same companies are Sardine (3 shared, 32 customers in all), Feedzai (1 shared, 21 customers in all), and Bretton AI (formerly Greenlite) (1 shared, 14 customers in all).Latest check Oct 8, 2026: 143 of 143 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.
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Unit21 customers also use another tool on this list
Sardine shares the most companies with Unit21: 3 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 Unit21. A shared customer has a confirmed or observed line on both tools.
| # | Alternative | Shared with Unit21 | Customers | Compare |
|---|---|---|---|---|
| 1 | SardineMostly Fintech & Payments (6) | 3 | 32 | Compare Unit21 vs Sardine |
| 2 |  Feedzai | 1 | 21 | Compare Unit21 vs Feedzai |
| 3 |  Bretton AI (formerly Greenlite) | 1 | 14 | Compare Unit21 vs Bretton AI (formerly Greenlite) |
Feedzai21 customers
Used by 21 companies on usedby. 1 also uses Unit21. Compare Unit21 and Feedzai
Source: feedzai.com, latest capture Oct 7, 2026.
Bretton AI (formerly Greenlite)14 customers
Used by 14 companies on usedby. 1 also uses Unit21. Compare Unit21 and Bretton AI (formerly Greenlite)
Source: bretton.com, latest capture Oct 7, 2026.
Other Fraud & AML tools on usedby
Same category, with public customers, but no company named with Unit21 yet.
ComplyAdvantage19 customers
Quantexa11 customers
Hawk6 customers
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 |
|---|---|---|---|
| Fintech & Payments | Sardine40% |  Unit2120% | 15 companies |
Read the first row as: among the 15 Fintech & Payments companies on usedby that use one of these tools, 40% use Sardine. Shares can add up to more than 100% because some companies use two tools.
Questions about Unit21 alternatives
Which tool shares the most customers with Unit21?
Sardine: 3 companies use both on usedby. Sardine has 32 customers in all. See who uses Sardine.
Do Unit21 customers use other tools too?
4 of the 40 Unit21 customers on usedby also use another tool on this list. Sardine shares the most: 3.
Which of Unit21 and its alternatives do Fintech & Payments companies on usedby use?
Among the 15 Fintech & Payments companies on usedby that use one of these tools, 40% use Sardine. Unit21 comes next, with 20%.
How does usedby rank Unit21 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.