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LangSmithPydantic Logfire
Freemium

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

 Freemium

Free for 10 million spans, logs and metrics per month, no card required; paid plans above…

Web Web
  • Detailed step-by-step agent tracing
  • SDKs for Python, TypeScript, Go and Java
  • Traces LLM calls alongside API and database activity
  • Built on OpenTelemetry with SQL querying
  • Proprietary hosted service
  • Self-hosting requires Kubernetes
  • Primarily a hosted service requiring an account
  • Self-hosting is offered as an option rather than the default
Self-hosted, Hosted service Web application, Hosted service
Closed source Closed source
License not stated License not stated
Account needed Account needed
Needs internet Needs internet

Checked September 26, 2026

Checked October 2, 2026

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