Latitude

Open-source LLM observability. Self-hostable, OpenTelemetry-native.

Tracing, evals, prompt management, and dataset tooling for LLM apps — self-host on your own infra or use Langfuse Cloud. The open-source default when you want full ownership of your observability stack.

LangChain's hosted observability + eval platform.

Tracing, dataset management, eval orchestration, and prompt playground from the LangChain team. Pairs naturally if LangChain or LangGraph already runs in your stack, but works standalone via SDKs.

Open-source LLM observability, evaluation, and agent testing.

An open-source platform for monitoring, evaluating, and testing LLM and agent applications. LangWatch captures traces, runs evaluations and simulations, and surfaces quality and cost metrics in production. Offered as managed cloud or fully self-hosted for teams with strict data-residency needs.

Hosted eval + tracing platform for LLM apps.

Production-grade eval orchestration with a dashboard, dataset versioning, and OpenTelemetry tracing. Useful once eval volume outgrows a CI YAML file.