# DeepEval vs Prefactor (slim)

> Prefactor and DeepEval score within a point of each other for evaluations, 65.6 and 64.7 out of 100. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/deepeval-vs-prefactor.md (~2,650 tokens) · this version ~630 tokens · JSON https://www.anchorterminal.com/compare/deepeval-vs-prefactor.json · canonical https://www.anchorterminal.com/compare/deepeval-vs-prefactor
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-09

Prefactor and DeepEval score within a point of each other on agent readiness, 65.6 (B) and 64.7 (B). DeepEval leads on payments & pricing and transparency & trust. Both do evaluations.

- DeepEval: B 64.7, rank #343 of 950 · https://www.anchorterminal.com/tools/deepeval.min.md
- Prefactor: B 65.6, rank #313 of 950 · https://www.anchorterminal.com/tools/prefactor.min.md
- DeepEval, good for Teams that want evaluations in pytest or a CLI on their own machines, with agent, RAG, multi-turn and MCP metrics. Ahead on Payments & pricing, 60 against 40; Transparency & trust, 63 against 42. Also Open source; No incidents deducted, where Prefactor loses 3 points for them.
- Prefactor, good for A team that wants an auditable record of agent runs with declared data-risk labels, quality payloads from its own evaluations and a remote stop signal. Ahead on Reliability, 78 against 59; Agent ergonomics, 88 against 72; Security & auth, 56 against 47. Also A hosted endpoint, with nothing to install.

| Category | DeepEval | Prefactor |
| --- | --- | --- |
| Reliability (16%) | 59 | 78 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 78 | 80 |
| Agent ergonomics (13%) | 72 | 88 |
| Security & auth (14%) | 47 | 56 |
| Payments & pricing (10%) | 60 | 40 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 83 | 82 |
| Transparency & trust (7%) | 63 | 42 |

| Fact (where they differ) | DeepEval | Prefactor |
| --- | --- | --- |
| Kind | SDK + MCP | HTTP API |
| Vendor | Confident AI, Inc. | Prefactor Pty Ltd |
| Hosted endpoint | no (local only) | `https://app.prefactorai.com/api/v1` |
| Transports |  | HTTP |
| Auth | OAuth or key | API key |
| Licence | Apache 2.0 for the Python and TypeScript packages and the agent skills. Confident AI, the hosted platform, is a proprietary service under its own terms | Proprietary hosted service. The TypeScript and Python SDKs and the CLI are MIT |
| Last release | 2026-10-02 | 2026-09-13 |
| Privacy policy last updated | no document linked | couldn't be read |
| Popularity | 19k stars, 35k npm/wk, 736k PyPI/wk | 3 stars, 19 npm/wk, 28 PyPI/wk |