German non-profit organisation which helps ordinary people “de-Google” their phones by installing privacy-friendly operating systems. They run events to help with this including workshops, exhibitions, lectures etc.

Fediverse address (main account, in German):
@topio@mastodon.social

Fediverse address (photos, in German):
@topio@pixelfed.social

Fediverse address (events, in German):
@topio_space@mobilize.berlin