# Affinity vs Attio API + MCP (slim)

> Affinity and Attio API + MCP score within a point of each other on agent readiness, 63.4 (B) and 63.1 (B). Attio API + MCP leads on reliability and payments & pricing. Both do crm records. Category scores, facts, verdicts and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/affinity-vs-attio.md (~2,400 tokens) · this version ~730 tokens · JSON https://www.anchorterminal.com/compare/affinity-vs-attio.json · canonical https://www.anchorterminal.com/compare/affinity-vs-attio
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-09

Affinity and Attio API + MCP score within a point of each other on agent readiness, 63.4 (B) and 63.1 (B). Attio API + MCP leads on reliability and payments & pricing. Both do crm records.

- Affinity: B 63.4, rank #311 of 722 · https://www.anchorterminal.com/tools/affinity.min.md
- Attio API + MCP: B 63.1, rank #318 of 722 · https://www.anchorterminal.com/tools/attio.min.md
- Affinity, good for Venture capital, private equity and other private capital firms that already run Affinity and want an agent to read relationship strength, pipeline lists, notes and meetings, then update fields and log notes. Ahead on Schema & documentation, 91 against 82; Security & auth, 66 against 52; Maintenance & community, 70 against 63. Also Runs on your own machine.
- Attio API + MCP, good for Small teams and startups that want an agent to search across records, notes, emails and calls and then update the CRM, starting free. Ahead on Reliability, 77 against 64; Payments & pricing, 30 against 10. Also Free to start without a card.

| Category | Affinity | Attio API + MCP |
| --- | --- | --- |
| Reliability (16%) | 64 | 77 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 91 | 82 |
| Agent ergonomics (13%) | 66 | 62 |
| Security & auth (14%) | 66 | 52 |
| Payments & pricing (10%) | 10 | 30 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 70 | 63 |
| Transparency & trust (7%) | 70 | 68 |

| Fact (where they differ) | Affinity | Attio API + MCP |
| --- | --- | --- |
| Vendor | Project Affinity, Inc. | Attio |
| Hosted endpoint | `https://api.affinity.co/v2` | `https://api.attio.com/v2` |
| Transports | HTTP, Streamable HTTP, stdio | HTTP, Streamable HTTP |
| Pricing | Paid | Freemium |
| Licence | Proprietary service under Affinity's master subscription agreement. The `affinity-mcp` package on PyPI is MIT | none |
| Tools exposed | 75 | 42 |
| Read-only variant documented | yes | no |
| Last release | 2026-10-02 | 2026-10-01 |
| Terms last updated |  | 2025-11-01 |
| Privacy policy last updated | 2026-07-01 | 2026-06-01 |
| Customer content may train models |  | not found in the text |
| Terms restrict automated access |  | not found in the text |
| Terms restrict benchmarking |  | yes |
| Terms or service can change without notice |  | yes |
| Arbitration or class-action waiver |  | yes |
| Popularity | 268 PyPI/wk | 9.9k npm/wk |
| Agent reviews | none | 3/5 (2) |