Best LLM Evaluation Tools in 2026
Updated
In short: Promptfoo is ranked #1 of 29 as of 5 October 2026, ahead of DeepEval and Maxim AI. The best-ranked option with a free plan is DeepEval. The lowest first paid tier on this page is Maxim AI at $29/mo.
LLM evaluation tools help teams examine prompts and model outputs through defined measures and review processes. Compare custom metrics, safety evaluations and LLM-as-a-judge with human review workflows and prompt versioning. CI/CD integration and deployment options offer further ways to assess how a tool can fit into development work, while free-plan availability and paid-from pricing clarify access and cost. The entries include Promptfoo, DeepEval and Maxim AI, with Giskard also represented. Consider which evaluation methods and workflow connections matter to your team before weighing the available options.
29 LLM evaluation tools ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
29ranked
11free plans on this page
$29/molowest paid tier
5 Oct 2026last checked
Input list LLM Evaluation Tools 25 channels on this page · 115 of 200 spec lines stated by the makers
Ch Tool Free planPaid fromDeployment optionsCustom metricsLLM-as-a-judgeSafety evaluationsHuman review workflowsPrompt versioning Spec sheet Score
01 Promptfoo Free planYesPaid fromnot statedDeployment optionsbothCustom metricsYesLLM-as-a-judgeYesSafety evaluationsYesHuman review workflowsYesPrompt versioningnot stated 6/8spec lines stated 7.5
02 DeepEval Free planYesPaid fromnot statedDeployment optionsbothCustom metricsYesLLM-as-a-judgeYesSafety evaluationsYesHuman review workflowsYesPrompt versioningYes 7/8spec lines stated 7.4
03 Maxim AI Free planYesPaid fromnot statedDeployment optionsbothCustom metricsYesLLM-as-a-judgeYesSafety evaluationsYesHuman review workflowsYesPrompt versioningYes 7/8spec lines stated 7.4
04 Giskard Free planYesPaid fromnot statedDeployment optionsbothCustom metricsYesLLM-as-a-judgeYesSafety evaluationsYesHuman review workflowsYesPrompt versioningnot stated 6/8spec lines stated 7.2
05 Braintrust Free planYesPaid from$249/moDeployment optionsbothCustom metricsYesLLM-as-a-judgeYesSafety evaluationsYesHuman review workflowsYesPrompt versioningYes 8/8spec lines stated 7.1
06 Galileo Free planYesPaid from$100/moDeployment optionsbothCustom metricsYesLLM-as-a-judgeYesSafety evaluationsYesHuman review workflowsYesPrompt versioningYes 8/8spec lines stated 7.1
07 Parea AI Free planYesPaid fromnot statedDeployment optionsbothCustom metricsYesLLM-as-a-judgeYesSafety evaluationsYesHuman review workflowsYesPrompt versioningYes 7/8spec lines stated 7.1
08 Confident AI Free planYesPaid from$200/moDeployment optionsbothCustom metricsYesLLM-as-a-judgeYesSafety evaluationsYesHuman review workflowsYesPrompt versioningYes 8/8spec lines stated 7.0
09 LiveBench Free plannot statedPaid fromnot statedDeployment optionsbothCustom metricsnot statedLLM-as-a-judgeNoSafety evaluationsnot statedHuman review workflowsnot statedPrompt versioningnot stated 2/8spec lines stated 6.9
10 Inspect AI Free plannot statedPaid fromnot statedDeployment optionsself-hostedCustom metricsYesLLM-as-a-judgeYesSafety evaluationsYesHuman review workflowsYesPrompt versioningnot stated 5/8spec lines stated 6.7
11 LM Evaluation Harness Free plannot statedPaid fromnot statedDeployment optionsself-hostedCustom metricsYesLLM-as-a-judgenot statedSafety evaluationsYesHuman review workflowsnot statedPrompt versioningnot stated 3/8spec lines stated 6.7
12 Ragas Free planYesPaid fromnot statedDeployment optionsself-hostedCustom metricsYesLLM-as-a-judgeYesSafety evaluationsnot statedHuman review workflowsnot statedPrompt versioningYes 5/8spec lines stated 6.7
13 RAGChecker Free plannot statedPaid fromnot statedDeployment optionsself-hostedCustom metricsNoLLM-as-a-judgeYesSafety evaluationsnot statedHuman review workflowsnot statedPrompt versioningnot stated 3/8spec lines stated 6.5
14 ARES Free plannot statedPaid fromnot statedDeployment optionsself-hostedCustom metricsnot statedLLM-as-a-judgeYesSafety evaluationsnot statedHuman review workflowsnot statedPrompt versioningnot stated 2/8spec lines stated 6.4
15 EvalPlus Free plannot statedPaid fromnot statedDeployment optionsself-hostedCustom metricsnot statedLLM-as-a-judgenot statedSafety evaluationsnot statedHuman review workflowsnot statedPrompt versioningnot stated 1/8spec lines stated 6.3
16 Whisper Free planYesPaid fromnot statedDeployment optionsbothCustom metricsYesLLM-as-a-judgeYesSafety evaluationsYesHuman review workflowsnot statedPrompt versioningnot stated 5/8spec lines stated 6.3
17 DecodingTrust Free plannot statedPaid fromnot statedDeployment optionsself-hostedCustom metricsnot statedLLM-as-a-judgenot statedSafety evaluationsYesHuman review workflowsnot statedPrompt versioningnot stated 2/8spec lines stated 6.2
18 garak Free planYesPaid fromnot statedDeployment optionsself-hostedCustom metricsYesLLM-as-a-judgeYesSafety evaluationsYesHuman review workflowsnot statedPrompt versioningnot stated 5/8spec lines stated 6.2
19 WebArena Free plannot statedPaid fromnot statedDeployment optionsbothCustom metricsnot statedLLM-as-a-judgenot statedSafety evaluationsnot statedHuman review workflowsnot statedPrompt versioningnot stated 1/8spec lines stated 6.2
20 HELM Free plannot statedPaid fromnot statedDeployment optionsself-hostedCustom metricsYesLLM-as-a-judgeYesSafety evaluationsYesHuman review workflowsYesPrompt versioningnot stated 5/8spec lines stated 5.9
21 SWE-bench Free planYesPaid fromnot statedDeployment optionsbothCustom metricsnot statedLLM-as-a-judgenot statedSafety evaluationsnot statedHuman review workflowsnot statedPrompt versioningnot stated 2/8spec lines stated 5.9
22 Arena (formerly Chatbot Arena) Free planYesPaid fromnot statedDeployment optionscloudCustom metricsnot statedLLM-as-a-judgenot statedSafety evaluationsYesHuman review workflowsYesPrompt versioningnot stated 4/8spec lines stated 5.8
23 OpenCompass Free planYesPaid fromnot statedDeployment optionsself-hostedCustom metricsYesLLM-as-a-judgeYesSafety evaluationsYesHuman review workflowsYesPrompt versioningnot stated 6/8spec lines stated 5.8
24 Parler-TTS Free plannot statedPaid fromnot statedDeployment optionsself-hostedCustom metricsYesLLM-as-a-judgeYesSafety evaluationsnot statedHuman review workflowsnot statedPrompt versioningnot stated 3/8spec lines stated 5.8
25 PyRIT Free plannot statedPaid fromnot statedDeployment optionsbothCustom metricsYesLLM-as-a-judgeYesSafety evaluationsYesHuman review workflowsnot statedPrompt versioningnot stated 4/8spec lines stated 5.8
Compare all 25 in a table
| # | Tool | Score | Free plan | From | Free plan | Paid from | Deployment options | Custom metrics |
|---|---|---|---|---|---|---|---|---|
| 1 | Promptfoo | 7.5 | Free plan | Free | Yes | — | both | Yes |
| 2 | DeepEval | 7.4 | Free plan | Free | Yes | — | both | Yes |
| 3 | Maxim AI | 7.4 | Free plan | $29/mo | Yes | — | both | Yes |
| 4 | Giskard | 7.2 | Free plan | Free | Yes | — | both | Yes |
| 5 | Braintrust | 7.1 | Free plan | $249/mo | Yes | 249 /mo | both | Yes |
| 6 | Galileo | 7.1 | Free plan | $100/mo | Yes | 100 /mo | both | Yes |
| 7 | Parea AI | 7.1 | Free plan | $150/mo | Yes | — | both | Yes |
| 8 | Confident AI | 7.0 | Free plan | $200/mo | Yes | 200 /mo | both | Yes |
| 9 | LiveBench | 6.9 | No | — | — | — | both | — |
| 10 | Inspect AI | 6.7 | Free plan | Free | — | — | self-hosted | Yes |
| 11 | LM Evaluation Harness | 6.7 | Free plan | Free | — | — | self-hosted | Yes |
| 12 | Ragas | 6.7 | No | — | Yes | — | self-hosted | Yes |
| 13 | RAGChecker | 6.5 | Free plan | Free | — | — | self-hosted | No |
| 14 | ARES | 6.4 | No | — | — | — | self-hosted | — |
| 15 | EvalPlus | 6.3 | No | — | — | — | self-hosted | — |
| 16 | Whisper | 6.3 | No | — | Yes | — | both | Yes |
| 17 | DecodingTrust | 6.2 | No | — | — | — | self-hosted | — |
| 18 | garak | 6.2 | No | — | Yes | — | self-hosted | Yes |
| 19 | WebArena | 6.2 | No | — | — | — | both | — |
| 20 | HELM | 5.9 | No | — | — | — | self-hosted | Yes |
| 21 | SWE-bench | 5.9 | No | — | Yes | — | both | — |
| 22 | Arena (formerly Chatbot Arena) | 5.8 | No | — | Yes | — | cloud | — |
| 23 | OpenCompass | 5.8 | No | — | Yes | — | self-hosted | Yes |
| 24 | Parler-TTS | 5.8 | No | — | — | — | self-hosted | Yes |
| 25 | PyRIT | 5.8 | No | — | — | — | both | Yes |
Is your tool on this list?
Numbered spots on this list can be sponsored, and a sponsored row is labelled as paid.
Questions about this list
Which LLM evaluation tool is ranked first on Specifiction?
Promptfoo is ranked #1 of 29 with a score of 7.5. DeepEval is second and Maxim AI third.
How many of these have a free plan?
11 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 what each maker publishes, the fullest spec sheet first: how deeply the product is documented, the platforms it runs on, a free tier or trial to test it, and its standing.
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