Key features
Core capabilities each platform advertises.
OpenObserve- Logs, metrics, traces, RUM, and session replay
- OpenTelemetry-native LLM tracing with token and cost tracking
- Online evaluations with LLM-judge or remote scorers
Data not available
Updated March 10, 2026
OpenObserve is an open-source observability platform for logs, metrics, traces, and LLM apps, priced per GB with no seat or host fees.
Opik by Comet is an open-source LLM evaluation and observability platform. It provides tracing, evaluation scoring, dataset management, and experiment tracking for LLM applications. Opik supports automated LLM-as-judge evaluations and integrates with popular frameworks like LangChain and LlamaIndex.
Core capabilities each platform advertises.
OpenObserveWhat each tool does well, and the limitations to keep in mind.
OpenObservePros
Cons
Pros
Cons
Choose OpenObserve if you wantChoose if you want
Choose Opik if you wantChoose if you want
Respan lets you trace LLM and agent calls across any model or framework, A/B test prompts on production traffic, and route requests across 1,000+ models through one gateway.
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