Best AI Agent Evaluation Tools in 2026
Updated
In short: Future AGI AI Evaluation SDK is ranked #1 of 29 as of 7 October 2026, ahead of Promptfoo and W&B Weave. The best-ranked option with a free plan is Promptfoo. The lowest first paid tier on this page is Amazon Bedrock Data Automation at $0.01/mo.
When you need to assess an AI agent, the useful comparison is what each tool can evaluate and what evidence it can bring into view. Compared on evaluation methods, tool-call checks, safety evaluations, and trace ingestion, these options offer different ways to examine behavior. SDK language support and dataset limits may shape how they fit your workflow, while regression runs can help you compare changes. Check free plans and paid-from pricing alongside those capabilities. Future AGI AI Evaluation SDK, Promptfoo, and W&B Weave are among the tools to consider, with DeepEval and Noveum also represented among the entries.
29 AI agent evaluation tools ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
22 of the 25 here have a free tier you can use, 0 have open-source code on record, and 0 have full bars: free, open, on most of your devices and documented.
| # | App | Signal | Free tier | Open code | Devices | From | Score |
|---|---|---|---|---|---|---|---|
| 1 | Future AGI AI Evaluation SDKWeb · Windows · Mac · Linux · Self-hosted · API | Three bars | — | 4 of 6 | $250/mo | 6.6 | |
| 2 | PromptfooWeb · Windows · Mac · Linux · Self-hosted · API | Three bars | — | 4 of 6 | Free | 6.6 | |
| 3 | W&B WeaveWeb · Windows · Mac · Linux · Self-hosted · API | Three bars | — | 4 of 6 | $60/mo | 6.6 | |
| 4 | DeepEvalWindows · Mac · Linux · Self-hosted | Three bars | — | 3 of 6 | Free | 6.5 | |
| 5 | NoveumWeb · Linux · Self-hosted · API | Two bars | — | 2 of 6 | $69/mo | 6.5 | |
| 6 | OpikWeb · Linux · Self-hosted · API | Two bars | — | 2 of 6 | $19/mo | 6.5 | |
| 7 | Strands EvalsWindows · Mac · Linux · Self-hosted · API | Three bars | — | 3 of 6 | Free | 6.5 | |
| 8 | AgentClashWeb · Self-hosted · API | Two bars | — | 1 of 6 | $49/mo | 6.4 | |
| 9 | ArklexLinux · Self-hosted · API | Two bars | — | 1 of 6 | Free | 6.4 | |
| 10 | BraintrustWeb · Self-hosted · API | Two bars | — | 1 of 6 | $249/mo | 6.4 | |
| 11 | GalileoWeb · Self-hosted · API | Two bars | — | 1 of 6 | $100/mo | 6.4 | |
| 12 | GiskardWeb · Linux · Self-hosted · API | Two bars | — | 2 of 6 | Free | 6.4 | |
| 13 | Google Cloud Agent EvaluationWeb · API | Two bars | — | 1 of 6 | — | 6.4 | |
| 14 | LangSmithWeb · Self-hosted · API | Two bars | — | 1 of 6 | $39/mo | 6.4 | |
| 15 | LangWatchWeb · Linux · Self-hosted · API | Two bars | — | 2 of 6 | €29/mo | 6.4 | |
| 16 | Maxim AIWeb · Self-hosted · API | Two bars | — | 1 of 6 | $29/mo | 6.4 | |
| 17 | TangleWeb · Linux · API | Two bars | — | 2 of 6 | Free | 6.4 | |
| 18 | HoneyHiveWeb · Self-hosted · API | Two bars | — | 1 of 6 | Free | 6.3 | |
| 19 | MLflow GenAI EvaluationWeb · Self-hosted · API | Two bars | — | 1 of 6 | Free | 6.3 | |
| 20 | Parea AIWeb · Self-hosted · API | Two bars | — | 1 of 6 | $150/mo | 6.3 | |
| 21 | Inspect AIAPI · Extension | Two bars | — | 0 of 6 | Free | 6.2 | |
| 22 | Amazon Bedrock Data AutomationAPI | One bar | — | — | 0 of 6 | $0.01/mo | 5.3 |
| 23 | ExgenticWeb · Self-hosted | One bar | — | — | 1 of 6 | — | 5.3 |
| 24 | SenseiNo platforms listed | One bar | — | — | 0 of 6 | — | 5.2 |
| 25 | VRUNAIWeb | One bar | — | 1 of 6 | Free | 5.2 |
Compare all 25 in a table
| # | App | Score | Free plan | From | Free plan | Paid from | Evaluation methods | Tool-call checks |
|---|---|---|---|---|---|---|---|---|
| 1 | Future AGI AI Evaluation SDK | 6.6 | Free plan | $250/mo | Yes | 0 /mo | hybrid | Yes |
| 2 | Promptfoo | 6.6 | Free plan | Free | Yes | — | — | — |
| 3 | W&B Weave | 6.6 | Free plan | $60/mo | Yes | 60 /mo | — | — |
| 4 | DeepEval | 6.5 | Free plan | Free | Yes | — | model | Yes |
| 5 | Noveum | 6.5 | Free plan | $69/mo | Yes | 69 /mo | hybrid | Yes |
| 6 | Opik | 6.5 | Free plan | $19/mo | Yes | 19 /mo | — | — |
| 7 | Strands Evals | 6.5 | Free plan | Free | — | — | hybrid | Yes |
| 8 | AgentClash | 6.4 | Free plan | $49/mo | Yes | 39 /mo | hybrid | Yes |
| 9 | Arklex | 6.4 | Free plan | Free | — | — | model | Yes |
| 10 | Braintrust | 6.4 | Free plan | $249/mo | Yes | 249 /mo | — | — |
| 11 | Galileo | 6.4 | Free plan | $100/mo | Yes | 100 /mo | — | — |
| 12 | Giskard | 6.4 | Free plan | Free | Yes | — | — | — |
| 13 | Google Cloud Agent Evaluation | 6.4 | No | — | — | — | hybrid | Yes |
| 14 | LangSmith | 6.4 | Free plan | $39/mo | Yes | — | — | — |
| 15 | LangWatch | 6.4 | Free plan | €29/mo | Yes | — | — | — |
| 16 | Maxim AI | 6.4 | Free plan | $29/mo | Yes | — | — | — |
| 17 | Tangle | 6.4 | Free plan | Free | Yes | 29 /mo | — | Yes |
| 18 | HoneyHive | 6.3 | Free plan | Free | Yes | — | — | — |
| 19 | MLflow GenAI Evaluation | 6.3 | Free plan | Free | Yes | — | hybrid | Yes |
| 20 | Parea AI | 6.3 | Free plan | $150/mo | Yes | — | — | — |
| 21 | Inspect AI | 6.2 | Free plan | Free | — | — | — | — |
| 22 | Amazon Bedrock Data Automation | 5.3 | No | $0.01/mo | — | — | — | — |
| 23 | Exgentic | 5.3 | No | — | — | — | code | Yes |
| 24 | Sensei | 5.2 | No | — | — | — | hybrid | — |
| 25 | VRUNAI | 5.2 | Free plan | Free | Yes | — | code | Yes |
Is your app on this list?
Numbered spots on this list can be sponsored, and a sponsored row is labelled as paid.
Questions about this list
Which AI agent evaluation tool is ranked first on Freedom251?
Future AGI AI Evaluation SDK is ranked #1 of 29 with a score of 6.6. Promptfoo is second and W&B Weave third.
How many of these have a free plan?
21 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, Amazon Bedrock Data Automation has the lowest first paid tier we found: $0.01/mo.
How is this list ranked?
Ranked free-and-open first: a usable free tier and open-source code, then the platforms it runs on and its documentation.