Langfuse has announced the open-sourcing of all its remaining product features under the MIT license, enabling developers to freely access and self-host components such as managed LLM-as-a-judge evaluations, annotation queues, prompt experiments, and the playground. This move solidifies Langfuse's commitment to being an open-source LLM Engineering Platform, aimed at fostering community trust, collaboration, and rapid iteration. The company retains commercial licensing only for features related to enterprise security and support, while focusing its commercial efforts on Langfuse Cloud and enterprise platform teams. With over 8,000 monthly active self-hosted instances and millions of SDK installs and Docker pulls, Langfuse is poised to become the leading choice for an open-source platform in LLMOps, inviting the community to contribute to its development through GitHub.