Editorial take
Why it stands out
Opik should be framed as an AI engineering platform for tracing and evals, not just as another logging tool.
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Tool profile
Open-source LLM observability and evaluation platform from Comet with tracing, datasets, LLM-as-a-judge metrics, and a clear free-to-pro pricing ladder.
LLM observability
Opik belongs in the database because it is one of the stronger open-source-rooted platforms for debugging, evaluating, and improving LLM applications. The official docs describe it as an open-source logging, debugging, and optimization platform for AI agents and LLM applications, while the product pages emphasize traces, experiments, datasets, scoring, agent optimization, and guardrails. That makes Opik more than a trace viewer. It is a real AI engineering platform for teams trying to improve system quality over time.
It also deserves inclusion because the pricing is unusually legible. Comet currently offers Opik Open Source at $0, Free Cloud at $0 with 25k spans per month, Pro Cloud at $19/month with 100k spans per month, and Enterprise as custom pricing. That combination of OSS availability and clear hosted packaging makes Opik a high-quality entry for teams deciding whether they want self-hosting, free cloud development, or a paid observability workflow.
Quick fit
Editorial take
Opik should be framed as an AI engineering platform for tracing and evals, not just as another logging tool.
What it does well
Primary use cases
Fit notes
Compare with
Pressure-test this pick against nearby alternatives.
Pricing snapshot
Opik currently offers Open Source at $0, Free Cloud at $0 with 25k spans per month, Pro Cloud at $19 per month with 100k spans per month, and Enterprise as custom pricing.
AgentOps
Free planAgent observability
Observability for AI agents with tracing, debugging, session visibility, and production monitoring.
Closer to agent observability than to model hosting or prompt tooling
