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LangWatch

freemium

Simulate real-world conversations to test agents

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LangWatch is a developer-first platform for testing, evaluating, and monitoring AI agents and LLM-powered applications. It provides tools for observability, evaluations, agent simulations, and prompt management, enabling teams to define evals, run experiments, simulate multi-step agent behavior, and monitor production signals. The platform supports a range of use cases including evaluating RAG quality, testing multimodal voice agents, and testing multi-turn conversations. It integrates with various LLM and agent frameworks via OpenTelemetry and offers self-hosted deployment options. LangWatch helps teams catch issues like model degradation, prompt regressions, and agent failures before shipping.

Key Benefits

  • Developer-first collaborative platform
  • Supports agent simulations for complex agentic AI
  • Integrates with OpenTelemetry and multiple frameworks
  • Open-source and self-hostable
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