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

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