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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. 17CalypsoAI Moderator15
  18. 18HiddenLayer Horizon Red Team15
  19. 19Protect AI Red Team Ops15
  20. 20Lakera Red Team15
  21. 21PromptLayer11
  22. 22PromptLayer Regression Suite11
  23. 23PromptLayer Eval Harness11
  24. 24LangSmith Eval Harness9
  25. 25Arize Phoenix9
  26. 26Arize Phoenix Evaluations9
  27. 27PromptOps Control Plane8
  28. 28Promptfoo7
  29. 29HiddenLayer AI Red Team7
  30. 30Traceloop AI Observability7
  31. 31LangSmith Evaluations7
  32. 32Promptfoo7
  33. 33Vigil AI Safety7
  34. 34Weights & Biases Prompts7
  35. 35Langfuse Observability7
  36. 36Traceloop LLM Observability7
  37. 37Promptfoo7
  38. 38Tuck Baby Monitor7
  39. 39GuardRails AI5
  40. 40Robust Intelligence Red Team5

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

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