OpenTalk is an open-source video conferencing platform from Germany developed by Heinlein Gruppe. The service is licensed under EUPL designed for European legal framework. OpenTalk includes features like breakout rooms and voting system. The platform provides moderation with multiple moderator support. OpenTalk offers free plan with 30-minute limit and 5-participant maximum. Paid plans start at €7.50 monthly per user. The service includes on-premise deployment with enterprise support.