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Opik vs PromptLayer: catalog facts
Opik	PromptLayer
Free The open-source platform is free to self-host.	Freemium Free plan available with paid tiers for teams.
Web, Self-hosted	Web
Tracing, automated evaluations and dashboards together Covers RAG systems and agent workflows	Visual prompt editing without code redeploys Evaluations with datasets, graders and human review
Self-hosting means running several services yourself Contributors must sign a CLA	Hosted service; prompts and logs live on its servers Requires an account
Self-hosted	Web application, Hosted service
Open source	Closed source
License not stated	License not stated
Not stated if an account is needed	Account needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked September 26, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.