The Open Source Summit (OSSUMMIT) Europe 2025 is scheduled to be located in Amsterdam, Netherlands. Open Source Summit is the premier event for open source developers, technologists, and community leaders to collaborate, share information, solve problems and gain knowledge, furthering open source innovation and ensuring a sustainable open source ecosystem. It is the gathering place for open source code and community contributors. Open Source Summit is a conference umbrella, composed of a collection of events covering the most important technologies, topics, and issues affecting open source today. Early bird registration (with a reduced fee) is usually between February and July.