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LangSmith vs Langfuse: catalog facts
LangSmith	Langfuse
Freemium Can be tried for free, with paid plans listed on its pricing page.	Freemium Open source for self-hosting, with a hosted version that can be started for free.
Web	Web, Self-hosted
Detailed step-by-step agent tracing SDKs for Python, TypeScript, Go and Java	Tracing, prompt management and evaluation in one tool Can be self-hosted or used as a hosted service
Proprietary hosted service Self-hosting requires Kubernetes	Requires instrumenting your application with its SDK Self-hosting means running and maintaining the server yourself
Self-hosted, 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
Official website Full listing and sources Checked September 26, 2026	Official website Full listing and sources Checked September 26, 2026

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