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Best Monitoring & Evaluation AI Tools

40 monitoring & evaluation tools, ranked by Stork's defensibility score — a human-reviewed verdict on which ones hold up as agents commoditize the rest.

  1. 1OpenMeter AI31
  2. 2Nightfall AI LLM Protection30
  3. 3Lakera Sense30
  4. 4Helicone29
  5. 5Weights & Biases Prompt Registry26
  6. 6Scale Validate26
  7. 7Braintrust Playground24
  8. 8Gretel Guardrails23
  9. 9HiddenLayer Malware Monitor23
  10. 10Ragas23
  11. 11Lakera Red Team22
  12. 12Lakera Guardrails22
  13. 13Lakera Red Team22
  14. 14LMSys Chatbot Arena22
  15. 15E2B Sandboxes19
  16. 16Weights & Biases Weave19
  17. 17Artificial Analysis19
  18. 18CalypsoAI Moderator15
  19. 19HiddenLayer Horizon Red Team15
  20. 20Protect AI Red Team Ops15
  21. 21Lakera Red Team15
  22. 22PromptLayer11
  23. 23PromptLayer Regression Suite11
  24. 24PromptLayer Eval Harness11
  25. 25LangSmith Eval Harness9
  26. 26Arize Phoenix9
  27. 27Arize Phoenix Evaluations9
  28. 28PromptOps Control Plane8
  29. 29Promptfoo7
  30. 30HiddenLayer AI Red Team7
  31. 31Traceloop AI Observability7
  32. 32LangSmith Evaluations7
  33. 33Promptfoo7
  34. 34Vigil AI Safety7
  35. 35Weights & Biases Prompts7
  36. 36Langfuse Observability7
  37. 37Traceloop LLM Observability7
  38. 38Promptfoo7
  39. 39Tuck Baby Monitor7
  40. 40GuardRails AI5

Ranked by the Stork score — human-reviewed, recomputed as model capabilities ship.

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