
LangWatch AI is an engineering platform for AI development teams, focused on providing testing, evaluation, monitoring, and optimization for AI agents and LLM applications.
Main features include AI Agent testing and simulation, LLM evaluation and quality monitoring, end-to-end observability, prompt and model management, and team collaboration and process integration.
Suitable for development teams building reliable AI systems, operations personnel, and product managers and domain experts who need to monitor and improve model output quality.
The platform supports scripting, randomized and adversarial probing to simulate thousands of dialogue scenarios (including multi-turn conversations and tool calls) for automated stress testing.
Offers online and offline evaluation, supports custom metrics, built-in checks (e.g., PII detection, jailbreak protection), and evaluation via LLM as judge or code-based tests.
Provides cloud quick-start, self-hosted, or hybrid deployment options, with Docker container support for on-premises deployment.
The platform offers enterprise-grade security and governance features such as role-based access control, and notes support for GDPR and ISO 27001 certifications. For specifics, please refer to the official docs.
The platform offers a free starter plan, with paid versions including longer data retention, technical support, and advanced features. For exact pricing, please check the official website.
Yes, the platform integrates with leading LLM providers, development frameworks, and tools, offering SDKs for Python, TypeScript, and Go, and supports integration via MCP or OpenTelemetry endpoints.
The platform provides prompt versioning, A/B testing, and supports drag-and-drop building and testing via a visual workspace to drive prompt iteration and optimization.

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Langfuse AI is an open-source LLM engineering and operations platform designed to help development teams build, monitor, debug, and optimize applications based on large language models. It enhances AI application development efficiency and observability by providing features such as application tracing, prompt management, quality assessment, and cost analysis.