Library / SDK
Observability & Evaluation
Laminar
1Open-source 2tracing 3and 4evals 5for 6agents
the six Ws · specification
W1
Who
Maintained by Laminar (lmnr-ai).
W2
What
Traces, evaluates, and analyzes LLM and agent applications.
W3
Where
Self-hosted or Laminar Cloud, via SDKs.
W4
When
When you need tracing plus evals for agent apps.
W5
Why
Combines observability and evaluation in one open platform.
W6
With
SDK instrumentation and a datastore.
W7
Watch
Company-maintained; open-source (Apache-2.0), self-hostable, with a hosted cloud (open-core). Self-hosting keeps traces local.
alternatives