A agentindex
Comparison

Lunary vs OpenLLMetry

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

Lunary

Open-source LLM observability and prompt management.

  • + Lightweight and self-hostable
  • + Clean prompt-management UI
  • − Smaller community
  • − Eval features basic

OpenLLMetry

OpenTelemetry instrumentation for LLMs.

  • + Vendor-neutral instrumentation
  • + Works with existing observability stacks
  • − Instrumentation only, no UI
  • − Needs a backend like SigNoz or Honeycomb
Spec Lunary OpenLLMetry
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 freemium free
Starting price Self-host free Free
Models multi multi
Languages typescript python, typescript
GitHub stars — 7.2k
Last activity — 2026-06-25