LangWatch offers a free plan, with paid plans starting at $0/mo.

Does LangWatch have an API?

Yes, LangWatch provides an API for developers.

What does LangWatch integrate with?

LangWatch integrates with Claude Code, Codex, opencode, OpenTelemetry, Jupyter, Docker, Kubernetes, Helm, and more.

Is LangWatch cloud-based or self-hosted?

LangWatch is offered as both cloud and self-hosted (hybrid) deployment.

What are the downsides of LangWatch?

Younger/smaller community than more established competitors Also, Narrower general metric depth than some competitors

Who is LangWatch best for?

LangWatch is best suited for AI Engineers, Product Managers, CTOs.

What can I use LangWatch for?

Common uses for LangWatch include spec-driven agent building from requirements, continuous agent testing in local and ci, red teaming agents for safety, replicating and fixing production issues via simulation.

LangWatch: Simulation-Based AI Agent Testing & Evaluation

LangWatch is an open-source, framework-agnostic platform for testing, evaluating, observing, and optimizing AI agents and LLM applications. It uses simulation-based testing with real-user text and voice conversations, LLM-as-a-judge evaluations, red teaming, and OpenTelemetry-native observability to catch issues and prevent regressions. It supports collaboration between technical and non-technical teams and can be deployed as cloud, self-hosted, or hybrid.

LangWatch

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