LangWatch

Agent observability and evals platform for tracing, testing, routing and governing LLM calls

LangWatch is an open-core LLMOps platform for AI platform teams. It provides tracing and observability for LLM calls and coding agents, multi-turn agent testing with simulated users and LLM-as-a-judge evaluations, an AI gateway for routing model calls with per-team budgets, and AI governance features. It supports OpenTelemetry, Python and TypeScript SDKs, integrations with frameworks like LangChain, LangGraph, CrewAI and Pydantic AI, and can be self-hosted (Apache 2.0 core) or used as a managed cloud service.

Category: Monitoring & observability
Pricing: freemium
Free tier: yes
API: yes
MCP server: yes
SDK: yes
Open source: yes

#llm-observability #agent-testing #evaluations #ai-gateway #prompt-management #opentelemetry #red-teaming #self-hosted

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Listed 2026-10-22 · last verified 2026-10-22 · extracted by @cf/zai-org/glm-5.3-flash · confidence 0.95

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API

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