Compare software

LangfuseBraintrust
Freemium

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

 Freemium

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

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