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TruLensMLflow
Free

Free and open source.

 Free

Free and open source.

Windows, macOS, Linux Web, Self-hosted, Command line
  • OpenTelemetry-native tracing of every agent step
  • Judges explain their scores, not just give numbers
  • Tracing built on OpenTelemetry, independent of LLM provider
  • 50+ built-in evaluation metrics and LLM judges
  • Aimed at developers comfortable writing code
  • LLM judges add their own model calls and cost
  • Broad feature set takes time to learn
  • Running it for a team means hosting and maintaining a server yourself
Downloadable app Downloadable app, Self-hosted
Open source Open source
License not stated License: Apache-2.0
Not stated if an account is needed No account needed
Not stated if it works offline Not stated if it works offline

Checked October 1, 2026

Checked September 26, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.