Compare software

Pydantic Logfire vs MLflow: catalog facts
Pydantic Logfire	MLflow
Freemium Free for 10 million spans, logs and metrics per month, no card required; paid plans above…	Free Free and open source.
Web	Web, Self-hosted, Command line
Traces LLM calls alongside API and database activity Built on OpenTelemetry with SQL querying	Tracing built on OpenTelemetry, independent of LLM provider 50+ built-in evaluation metrics and LLM judges
Primarily a hosted service requiring an account Self-hosting is offered as an option rather than the default	Broad feature set takes time to learn Running it for a team means hosting and maintaining a server yourself
Web application, Hosted service	Downloadable app, Self-hosted
Closed source	Open source
License not stated	License: Apache-2.0
Account needed	No account needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 26, 2026

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