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Langfuse vs Evidently: catalog facts
Langfuse	Evidently
Freemium Open source for self-hosting, with a hosted version that can be started for free.	Free Free and open source under the Apache 2.0 license.
Web, Self-hosted	Command line
Tracing, prompt management and evaluation in one tool Can be self-hosted or used as a hosted service	Covers both LLM systems and classic ML models Checks for drift, hallucinations and data leaks
Requires instrumenting your application with its SDK Self-hosting means running and maintaining the server yourself	Requires writing Python code to set up checks Some evaluations depend on access to a judge model
Self-hosted, Hosted service	Downloadable app
Open source	Open source
License not stated	License: Apache-2.0
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	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.