FOSDEM is held annually, usually during the first weekend of February,[2] at the Campus Solbosch [nl] of the Université Libre de Bruxelles (ULB) in the southeast of Brussels, Belgium.

FOSDEM was started in 2000[3] under the name Open Source Developers of Europe Meeting (OSDEM) by Raphael Bauduin.

As in previous editions, the activities were held at the Université Libre de Bruxelles using a total of 35 rooms.

[16] It was organised again in Brussels, celebrating 25 years of open source,[18] with a total of 787 speakers spread over 781 events, and 63 tracks.

[19] As usual, it was held in Brussels, with 948 speakers spread over 875 events and 67 themes, using the same infrastructure as the previous edition at the Université Libre de Bruxelles.

Jack Dorsey's scheduled talk representing Block, Inc.[34] caused controversy due to Dorsey's involvement in selling Twitter to Elon Musk,[35][36] together with doubts about the actual background of the speaker in open-source activities[35], as well as, the ethical concerns of Block, Inc. current business[37].