LangWatch

Name: LangWatch
Rating: 5.0 (5 reviews)

AI Agent Testing, Observing & Evaluation

5.0•5 reviews•

1.8K followers

AI Agent Testing, Observing & Evaluation

5.0•5 reviews•

1.8K followers

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When your agents get complex Simulation-based AI agent testing and evaluation that turns unpredictable agents into reliable production systems.

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LangWatch Launches

Claude Code usage tracking by LangWatch See what your Claude Code sessions actually cost

Launched on July 30th, 2026

LangWatch Scenario - Agent SimulationsAgentic testing for agentic codebases

Launched on June 26th, 2025

LangWatch Optimization StudioEvaluate & optimize your LLM performance with DSPy

Launched on December 19th, 2024

LangWatchUnderstand, measure and improve your LLMs

Launched on April 24th, 2024

5.0

Based on 5 reviews

Review LangWatch?

LangWatch Agent Simulations is highly praised for its transformative impact on AI testing. Users appreciate its open-source nature and focus on agentic testing, which enhances confidence in deploying autonomous agents. The platform's robust simulations, intuitive API, and visualization tools streamline the testing process, while community support and regular updates reflect a commitment to improvement. Users find it valuable for output monitoring, evaluation, and production optimization, with features like jailbreak detection and document tracking. Overall, it's considered essential for serious AI development and quality assurance.

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LangWatch

•1 review

I’ve been using LangWatch Agent Simulations for a few months now, and it has truly transformed the way I approach AI testing. The platform’s open-source nature and focus on agentic testing make it a powerful tool for developers who treat AI like software. The simulations are robust and help catch regressions early, giving me confidence in deploying autonomous agents. What I appreciate most is the intuitive api and the awesome visualization, which streamlines the testing process. The community support and regular updates also demonstrate a strong commitment to improving the platform. Overall, LangWatch Agent Simulations is a must-have for anyone serious about AI development and quality assurance. It’s a game-changer in ensuring AI systems perform reliably in real-world scenarios.

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98 views1yr ago

used LangWatch to build Coldtea.ai

instead of Langfuse

•9 reviews

Our agents run long, and when one goes wrong, the logs barely help. LangWatch shows the real run: every prompt and tool call, down to the step where it stalled. One OTel exporter registered at boot, and every agent has been traced since

Alternatives Considered

Langfuse

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2 views5d ago

•1 review

We've used LangWatch for output monitoring and evaluation of our RAG application. I can't recommend it enough. We find value in iterative evaluation with tools like DSPy and RAGAS, to production optimization features like jailbreak detection + document & topic tracking, all with a great dashboard and UI. The team has built a great product. Plus the team is very responsive and helpful.

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87 views1yr ago