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MLflow vs Promptfoo: catalog facts
MLflow	Promptfoo
Free Free and open source.	Freemium The open-source CLI is free; enterprise features are sold separately.
Web, Self-hosted, Command line	Command line
Tracing built on OpenTelemetry, independent of LLM provider 50+ built-in evaluation metrics and LLM judges	Runs from the command line with a single npx command Compares prompts and models side by side
Broad feature set takes time to learn Running it for a team means hosting and maintaining a server yourself	Red-teaming features are intended for authorized testing of your own applications Some reporting features belong to the paid enterprise edition
Downloadable app, Self-hosted	Downloadable app
Open source	Open source
License: Apache-2.0	License not stated
No account 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.