# Check vs Salsa (slim)

> Check scores 67.5 (B) on agent readiness against Salsa's 46.1 (D), and leads in 6 of 7 scored categories. Both do payroll run. Category scores, facts, verdicts and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/check-payroll-vs-salsa.md (~1,950 tokens) · this version ~630 tokens · JSON https://www.anchorterminal.com/compare/check-payroll-vs-salsa.json · canonical https://www.anchorterminal.com/compare/check-payroll-vs-salsa
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-08

Check scores 67.5 (B) on agent readiness against Salsa's 46.1 (D), and leads in 6 of 7 scored categories. Both do payroll run.

- Check: B 67.5, rank #193 of 629 · https://www.anchorterminal.com/tools/check-payroll.min.md
- Salsa: D 46.1, rank #565 of 629 · https://www.anchorterminal.com/tools/salsa.min.md
- Check, good for A software platform that wants to sell US payroll inside its own product and can sign a partnership, with Check handling tax calculation, money movement and filings. Ahead on Reliability, 80 against 36; Schema & documentation, 78 against 73; Agent ergonomics, 83 against 48; Security & auth, 74 against 56; Maintenance & community, 72 against 50; Transparency & trust, 62 against 51.
- Salsa, good for A software platform that wants to sell payroll to its own business customers and can sign a partner agreement, with Salsa handling tax filing and money movement.

| Category | Check | Salsa |
| --- | --- | --- |
| Reliability (16%) | 80 | 36 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 78 | 73 |
| Agent ergonomics (13%) | 83 | 48 |
| Security & auth (14%) | 74 | 56 |
| Payments & pricing (10%) | 5 | 5 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 72 | 50 |
| Transparency & trust (7%) | 62 | 51 |

| Fact (where they differ) | Check | Salsa |
| --- | --- | --- |
| Vendor | Check Technologies, Inc. | Salsa Software Inc. |
| Hosted endpoint | `https://api.checkhq.com` | `https://api.salsa.dev/api/rest/v1` |
| Auth | OAuth or key | API key |
| Licence | Proprietary service under Check's terms of service and partner agreement. The MCP server and CLI on GitHub are MIT | Proprietary service. The website Terms of Use are public and the partner agreement isn't. The browser library @salsa-payroll/salsa-js on npm is MIT |
| Read-only variant documented | yes | no |
| Terms last updated | 2021-09-03 | 2022-04-07 |
| Privacy policy last updated | 2024-04-18 | 2025-09-24 |
| Terms or service can change without notice | not found in the text | yes |
| Arbitration or class-action waiver | not found in the text | yes |
| Popularity | 18 stars | 435 npm/wk |