A agentindex
Comparison

OpenLLMetry vs Weights and Biases Weave

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

Weights and Biases Weave

LLM tracing and eval inside W&B.

  • + Integrates with existing W&B experiment tracking
  • + Good for ML teams already on W&B
  • − Most useful only if you already use W&B
  • − Proprietary
Spec OpenLLMetry Weights and Biases Weave
Category eval-observability eval-observability
License Apache-2.0 Proprietary
Open source Yes No
Self-hostable Yes No
MCP support No No
Pricing free freemium
Starting price Free Free tier
Models multi multi
Languages python, typescript python, typescript
GitHub stars 7.2k —
Last activity 2026-06-25 —