Chaos Communications Congress

Communication Congress 2025

The 39th Chaos Communication Congress (39C3) takes place in Hamburg on 27–30 Dec 2025, and is the 2025 edition of the annual four-day conference on technology, society and utopia organized by the Chaos Computer Club (CCC) and volunteers.

Congress offers lectures and workshops and various events on a multitude of topics including (but not limited to) information technology and generally a critical-creative attitude towards technology and the discussion about the effects of technological advances on society.

Starting in 1984, Congress has been organized by the community and appreciates all kinds of participation. You are encouraged to contribute by volunteering, setting up and hosting hands-on and self-organized events with the other components of your assembly or presenting your own projects to fellow hackers.

At the Chaos Communication Congress 2025, the UBports community, will be actively participating in hands-on activities and community exchanges. 

One highlight is the “Flashing Smartphones with Ubuntu Touch Linux” assembly, hosted by local Linux user groups in collaboration with UBports and related open-source initiatives. In this session, visitors can flash smartphones, get guidance on installation, ask questions about porting and development, and discover how mobile Linux can replace proprietary systems.