Compare software

BraintrustLangSmith
Freemium

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

 Freemium

Can be tried for free, with paid plans listed on its pricing page.

Web Web
  • Real-time tracing of prompts, responses and tool calls
  • Evals scored by LLMs, code or humans
  • Detailed step-by-step agent tracing
  • SDKs for Python, TypeScript, Go and Java
  • Hosted service that requires an account
  • Aimed at teams building LLM products, not individual users
  • Proprietary hosted service
  • Self-hosting requires Kubernetes
Hosted service Self-hosted, Hosted service
Closed source Closed source
License not stated License not stated
Account needed Account needed
Needs internet Needs internet

Checked October 1, 2026

Checked September 26, 2026

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