June 4, 2025 Doubling Down on Open Source Today we are open sourcing all remaining Product Features in Langfuse under the MIT license Marc Clemens MaxThe LLM landscape is changing rapidly and so are the workflows used to build and improve LLM apps. Langfuse is building the open source LLM Engineering Platform. Our Open Source JourneyLangfuse was launched as an open source project. Langfuse’s Open Core ModelArea Then Now Core Platform OSS (MIT) OSS (MIT) ✅ LLM-as-a-Judge Evaluations Commercial OSS (MIT) ✅ Playground Commercial OSS (MIT) ✅ Prompt Experiments Commercial OSS (MIT) ✅ Annotation/Data Labeling Commercial OSS (MIT) ✅ Enterprise Security Commercial Commercial 🔒 Enterprise Support Commercial Commercial 🔒As we open source previously commercial features, we are fully investing our commercial focus in Langfuse Cloud and Enterprise platform teams in self-hosting. We expect that today’s changes solidify Langfuse as the first choice for a powerful and truly open source platform in LLMOps.