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Comparison

Braintrust vs OpenLLMetry

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

Braintrust

Evals and prompt playground for serious teams.

  • + Excellent eval and scoring UX
  • + Strong for prompt-engineering-heavy teams
  • − Proprietary platform
  • − Self-host story limited

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 Braintrust OpenLLMetry
Category eval-observability eval-observability
License Proprietary Apache-2.0
Open source No Yes
Self-hostable No Yes
MCP support No No
Pricing freemium free
Starting price Free tier Free
Models multi multi
Languages python, typescript python, typescript
GitHub stars — 7.2k
Last activity — 2026-06-25