OpenTalk

GDPR-compliant video conferencing platform from Berlin, developed by the Heinlein Group (also behind mailbox.org). OpenTalk offers breakout rooms, polls, whiteboards, and moderation tools, with deployment options for on-premises or SaaS on German servers. The Community Edition is open source under EUPL-1.2, while the Enterprise Edition adds phone dial-in, audit-proof voting, and Kubernetes scaling.