Doubling Down on Open Source

Summary

June 4, 2025Doubling Down on Open SourceToday we are open sourcing all remaining Product Features in Langfuse under the MIT license The LLM landscape is changing rapidly and so are the workflows used to build and improve LLM apps. Today, we are open sourcing all Product Features in Langfuse to enable our community to iterate on their applications faster and provide our project with feedback on where to go next. Newly open sourced features include managed , , and , all of which are now freely available to self-host under the MIT license. If you are self-hosting Langfuse already today, upgrade your deployment to the . You will find a more powerful version of Langfuse. Why are we doing this? Langfuse is building the open source LLM Engineering Platform. We are building the platform to observe and improve LLM applications. We are constantly shipping to be the technology of choice for our community. This requires trust, feedback and buy-in from our community. We re-visited the gated features in our Enterprise Edition. If we want to be the first choice in the market, we need to allow our community to cover the entire dev cycle in our FOSS version. Features like LLM-as-a-Judge, Evals, or our Playground are market standard at this point and should be freely available. But why stop there? The best platform for developers has to be open at its core. By removing commercial barriers from our product features, we’re fostering deeper trust, collaborating on contributions, accelerating adoption, gathering richer community feedback, and iterating faster than ever. Our Open Source Journey Langfuse was as an open source project. This was based on a few : Data captured by Langfuse should be freely accessible The AI landscape changes every week – Langfuse must integrate agnostically with all models and application stacks Great teams deserve the flexibility to extend the platform to support custom workflows This positioning resonates and today we are doubling down on it. Langfuse has be...