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Opik vs Evidently: catalog facts
Opik	Evidently
Free The open-source platform is free to self-host.	Free Free and open source under the Apache 2.0 license.
Web, Self-hosted	Command line
Tracing, automated evaluations and dashboards together Covers RAG systems and agent workflows	Covers both LLM systems and classic ML models Checks for drift, hallucinations and data leaks
Self-hosting means running several services yourself Contributors must sign a CLA	Requires writing Python code to set up checks Some evaluations depend on access to a judge model
Self-hosted	Downloadable app
Open source	Open source
License not stated	License: Apache-2.0
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.