Langfuse shipped an update Langfuse, the open-source LLM engineering platform for tracing, evaluation, prompt management and debugging, was last updated in September 2026 and now carries 35k stars on GitHub. The TypeScript-based project, which ingests traces of LLM calls, retrieval, embeddings and agent actions and integrates with major LLM SDKs and frameworks, has been part of ClickHouse since January 2026. Most of Langfuse's code is MIT-licensed, with enterprise directories under a separate licence, and it can be self-hosted or used as Langfuse Cloud. Langfuse An open-source LLM engineering platform for tracing, evaluation, prompt management and debugging. Sources and review Checked against public documentation on . Suitability guidance is our editorial judgment; this is not a performance benchmark or an endorsement. Teams that want production-grade, self-hostable tracing and evals for LLM apps. About Langfuse Langfuse helps teams develop, monitor, evaluate and debug AI applications: it ingests traces of LLM calls, retrieval, embeddings and agent actions, runs evaluations, manages prompts and datasets, and integrates with the major LLM SDKs and frameworks. It can be self-hosted or used as Langfuse Cloud, and has been part of ClickHouse since January 2026. Most of the code is MIT-licensed; enterprise directories carry a separate licence. Langfuse is an open-source project written primarily in TypeScript, with 35k stars on GitHub. It was last updated in September 2026. pip install langfuse Make your product part of the discovery. Explore advertising Langfuse vs. the alternatives All 34 alternatives → https://agentsearchengine.app/alternatives/langfuse