Opik

Apache-2.0 LLM and agent tracing, evaluation and monitoring by Comet

AI Agents / Agents · Apache-2.0 · 22.7k

Reviewed 2026-10-18 · last push 2026-10-19 · repo checked 2026-10-19

What's Good

Apache-2.0 (comet-ml/opik), release 2.2.103 (2026-10-16). The full platform is free to self-host, backend included, via ./opik.sh with Docker Compose for local use or Kubernetes for scale. It covers trace annotation, a prompt playground, hallucination and RAG metrics, online evaluation rules on production traffic, a PyTest integration for evals in CI, and an MCP server. ★~22.7k.

The Catch

Self-hosting is a multi-service stack, not a single binary, so budget ops time or use Opik Cloud, Comet's hosted version with its own free tier and paid plans. README and docs links lean toward Comet sign-up. It overlaps heavily with Langfuse and Phoenix, so pick one tracing backend per project.

Verdict

A strong self-hostable Langfuse alternative with evals built in — choose it if CI evaluation matters most to you.

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