A agentindex
Comparison

OpenLLMetry vs Comet Opik

A like-for-like, spec-level comparison. Both entries are verified against their docs and repo.

OpenLLMetry

OpenTelemetry instrumentation for LLMs.

  • + Vendor-neutral instrumentation
  • + Works with existing observability stacks
  • − Instrumentation only, no UI
  • − Needs a backend like SigNoz or Honeycomb

Comet Opik

Open-source eval and tracing from Comet.

  • + Open source with self-host option
  • + Backed by Comet's MLOps experience
  • − Smaller community than Langfuse
  • − UI less polished than paid rivals
Spec OpenLLMetry Comet Opik
Category eval-observability eval-observability
License Apache-2.0 Apache-2.0
Open source Yes Yes
Self-hostable Yes Yes
MCP support No No
Pricing free freemium
Starting price Free Self-host free
Models multi multi
Languages python, typescript python, typescript
GitHub stars 7.2k 19.8k
Last activity 2026-06-25 2026-06-25