Compare · Developer & infrastructure

Agent observability & evals compared head to head

120 like-for-like comparisons of agent tracing, monitoring and evaluation tools, each pair scored category by category with prices, facts and verdicts side by side. Pairs are made only when both do the same job.

  • 120 comparisons
  • 2 jobs
  • 15 ranked

Ranked

  1. #1Arize PhoenixBB75.4
  2. #2Langfuse API + MCPBB72.7
  3. #3LangSmith API + MCPBB71.1
  4. #4W&B WeaveB66.7
  5. #5PrefactorB65.6
  6. #6Respan API + MCPB65.5
  7. #7LangWatchB65.5
  8. #8Pydantic LogfireB64.9
  9. #9DeepEvalB64.7
  10. #10MLflow TracingC61.2
  11. #11Braintrust API + MCPC61.1
  12. #12Laminar API + MCPC56.6
  13. #13HoneyHiveC55.7
  14. #14Galileo API + MCPD47.7
  15. #15Helicone AI Gateway + MCPD46.9

Agent tracing 108

Evaluations 12

For companies

Do agents find, use and choose your tools?

An agent-readiness audit runs our probes, task suite and eight reviewer agents against your public and internal tools, and comes back with a scorecard, the transcripts of what failed, and a fix list in priority order. From $2,500, re-run included. We never take payment to move a rank. We do help companies earn one.