Langfuse is the open-source LLM engineering platform that helps teams build useful AI applications through tracing, evaluation, prompt management, datasets, and metrics. We are now part of ClickHouse. Like ClickHouse, Langfuse is open source, and we work in public: our product, docs, changelog, roadmap, and community discussions are visible to the developers and teams who use us. Langfuse is already one of the most widely adopted platforms in the category: trusted by 19 of the Fortune 50 and 63 of the Fortune 500, with 50M+ SDK installs per month, 6M+ Docker pulls, and 30k+ GitHub stars.