Best LLM Evaluation Tools in 2026
Updated
In short: Maxim AI is ranked #1 of 29 as of 4 October 2026, ahead of Promptfoo and DeepEval. The best-ranked option with a free plan is Promptfoo. The lowest first paid tier on this page is Maxim AI at $29/mo.
Assessing prompts and model outputs calls for choices about what to measure and how evaluation fits into development work. Compare custom metrics and safety evaluations with LLM-as-a-judge, human review workflows, and prompt versioning. CI/CD integration and deployment options can help you assess how an evaluation tool aligns with your process. Free-plan availability and paid-from pricing provide further points of comparison. Maxim AI, Promptfoo, and DeepEval are among the entries, along with Galileo and Giskard. Consider which evaluation methods and workflow connections matter for your team, then compare options against those needs.
29 LLM evaluation tools ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
LLM Evaluation Tools, ranked on how quickly a newcomer can get going. 9 of the 25 on this page can be tried for free.
- 1 Maxim AIPaid from $29/mo
- Free to practise on: yes
- Free trial: yes
- Well documented: yes
- Runs where you work: not on record
- 2 PromptfooFree plan
- Free to practise on: yes
- Free trial: not on record
- Well documented: yes
- Runs where you work: yes
- 3 DeepEvalFree plan
- Free to practise on: yes
- Free trial: not on record
- Well documented: yes
- Runs where you work: yes
- 4 GalileoPaid from $100/mo
- Free to practise on: yes
- Free trial: not on record
- Well documented: yes
- Runs where you work: not on record
- 5 GiskardFree plan
- Free to practise on: yes
- Free trial: not on record
- Well documented: yes
- Runs where you work: not on record
- 6 BraintrustPaid from $249/mo
- Free to practise on: yes
- Free trial: not on record
- Well documented: yes
- Runs where you work: not on record
- 7 Parea AIPaid from $150/mo
- Free to practise on: yes
- Free trial: not on record
- Well documented: yes
- Runs where you work: not on record
- 8 Confident AIPaid from $200/mo
- Free to practise on: yes
- Free trial: not on record
- Well documented: yes
- Runs where you work: not on record
- 9 LiveBench
- Free to practise on: not on record
- Free trial: not on record
- Well documented: yes
- Runs where you work: yes
- 10 Ragas
- Free to practise on: not on record
- Free trial: not on record
- Well documented: yes
- Runs where you work: not on record
- 11 Whisper
- Free to practise on: not on record
- Free trial: not on record
- Well documented: yes
- Runs where you work: yes
- 12 garak
- Free to practise on: not on record
- Free trial: not on record
- Well documented: not on record
- Runs where you work: yes
- 13 HELM
- Free to practise on: not on record
- Free trial: not on record
- Well documented: not on record
- Runs where you work: not on record
- 14 Arena (formerly Chatbot Arena)
- Free to practise on: not on record
- Free trial: not on record
- Well documented: not on record
- Runs where you work: not on record
- 15 Inspect AIFree plan
- Free to practise on: not on record
- Free trial: not on record
- Well documented: yes
- Runs where you work: not on record
- 16 OpenCompass
- Free to practise on: not on record
- Free trial: not on record
- Well documented: yes
- Runs where you work: not on record
- 17 Parler-TTS
- Free to practise on: not on record
- Free trial: not on record
- Well documented: yes
- Runs where you work: not on record
- 18 PyRIT
- Free to practise on: not on record
- Free trial: not on record
- Well documented: not on record
- Runs where you work: not on record
- 19 SWE-bench
- Free to practise on: not on record
- Free trial: not on record
- Well documented: not on record
- Runs where you work: yes
- 20 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
- 21 TruLens
- Free to practise on: not on record
- Free trial: not on record
- Well documented: not on record
- Runs where you work: not on record
- 22 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
- 23 ARES
- Free to practise on: not on record
- Free trial: not on record
- Well documented: not on record
- Runs where you work: not on record
- 24 CloudSploit
- Free to practise on: not on record
- Free trial: not on record
- Well documented: not on record
- Runs where you work: not on record
- 25 LM Evaluation Harness
- Free to practise on: not on record
- Free trial: not on record
- Well documented: not on record
- Runs where you work: not on record
Is your platform on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which LLM evaluation tool is ranked first on The Geeks Club?
Maxim AI is ranked #1 of 29 with a score of 7.7. Promptfoo is second and DeepEval third.
How many of these have a free plan?
9 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, Maxim AI has the lowest first paid tier we found: $29/mo.
How is this list ranked?
Ranked on how quickly a newcomer can get going: documentation depth, a free tier or trial, and the platforms it runs on. Paid placements never change a rank.