Open source Self-hostable free
In these stacks
LicenseApache-2.0
PriceFree
UsageNo model cost
Model supportmulti
Languagespython, typescript
GitHub stars7.3k
Last activity2026-07-01
VerifiedThu Jun 25 2026 00:00:00 GMT+0000 (Coordinated Universal Time)
Verified byseed
A library that emits OpenTelemetry traces for LLM and agent calls, pipeable into any OTel-compatible backend.
Strengths
- Vendor-neutral instrumentation
- Works with existing observability stacks
Tradeoffs
- Instrumentation only, no UI
- Needs a backend like SigNoz or Honeycomb