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Evidently vs Promptfoo: catalog facts
Evidently	Promptfoo
Free Free and open source under the Apache 2.0 license.	Freemium The open-source CLI is free; enterprise features are sold separately.
Command line	Command line
Covers both LLM systems and classic ML models Checks for drift, hallucinations and data leaks	Runs from the command line with a single npx command Compares prompts and models side by side
Requires writing Python code to set up checks Some evaluations depend on access to a judge model	Red-teaming features are intended for authorized testing of your own applications Some reporting features belong to the paid enterprise edition
Downloadable app	Downloadable app
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.