Compare software

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