Best LLM Evaluation Tools in 2026
Updated
29 LLM evaluation tools ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
29ranked
2free plans on this page
7 Oct 2026last checked
LLM Evaluation Tools, ranked on how quickly a newcomer can get going. 2 of the 4 on this page can be tried for free.
- 26 HarmBench
- Free to practise on: not on record
- Free trial: not on record
- Well documented: not on record
- Runs where you work: not on record
- 27 TruLensFree plan
- Free to practise on: not on record
- Free trial: not on record
- Well documented: not on record
- Runs where you work: not on record
- 28 AgentBench
- Free to practise on: not on record
- Free trial: not on record
- Well documented: not on record
- Runs where you work: not on record
- 29 CloudSploitFree plan
- Free to practise on: not on record
- Free trial: not on record
- Well documented: not on record
- Runs where you work: not on record
Compare all 4 in a table
| # | Platform | Score | Free plan | From | Free plan | Paid from | Deployment options | Custom metrics |
|---|---|---|---|---|---|---|---|---|
| 26 | HarmBench | 5.7 | No | — | Yes | — | self-hosted | — |
| 27 | TruLens | 5.7 | Free plan | Free | — | — | self-hosted | Yes |
| 28 | AgentBench | 5.6 | No | — | Yes | — | self-hosted | — |
| 29 | CloudSploit | 5.5 | Free plan | Free | — | — | — | — |
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