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Evidently vs Opik: catalog facts
Evidently	Opik
Free Free and open source under the Apache 2.0 license.	Free The open-source platform is free to self-host.
Command line	Web, Self-hosted
Covers both LLM systems and classic ML models Checks for drift, hallucinations and data leaks	Tracing, automated evaluations and dashboards together Covers RAG systems and agent workflows
Requires writing Python code to set up checks Some evaluations depend on access to a judge model	Self-hosting means running several services yourself Contributors must sign a CLA
Downloadable app	Self-hosted
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.