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Promptfoo vs Opik: catalog facts
Promptfoo	Opik
Freemium The open-source CLI is free; enterprise features are sold separately.	Free The open-source platform is free to self-host.
Command line	Web, Self-hosted
Runs from the command line with a single npx command Compares prompts and models side by side	Tracing, automated evaluations and dashboards together Covers RAG systems and agent workflows
Red-teaming features are intended for authorized testing of your own applications Some reporting features belong to the paid enterprise edition	Self-hosting means running several services yourself Contributors must sign a CLA
Downloadable app	Self-hosted
Open source	Open source
License not stated	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.