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Weights & BiasesBraintrust
Freemium

Offers free use with paid plans for teams.

 Freemium

Self-serve sign-up with paid plans listed on the pricing page.

Web Web
  • Experiment tracking and comparison in one dashboard
  • Covers both classic ML training and LLM tracing
  • Real-time tracing of prompts, responses and tool calls
  • Evals scored by LLMs, code or humans
  • Requires an account and sends data to a hosted service
  • Proprietary platform
  • Hosted service that requires an account
  • Aimed at teams building LLM products, not individual users
Hosted service Hosted service
Closed source Closed source
License not stated License not stated
Account needed Account needed
Not stated if it works offline Needs internet

Checked September 26, 2026

Checked October 1, 2026

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