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BraintrustLangfuse
Freemium

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

 Freemium

Open source for self-hosting, with a hosted version that can be started for free.

Web Web, Self-hosted
  • Real-time tracing of prompts, responses and tool calls
  • Evals scored by LLMs, code or humans
  • Tracing, prompt management and evaluation in one tool
  • Can be self-hosted or used as a hosted service
  • Hosted service that requires an account
  • Aimed at teams building LLM products, not individual users
  • Requires instrumenting your application with its SDK
  • Self-hosting means running and maintaining the server yourself
Hosted service Self-hosted, Hosted service
Closed source Open source
License not stated License not stated
Account needed Not stated if an account is needed
Needs internet 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.