OpenTalk

Key Features

• Open source under EUPL license with self-hosting option; developed by Heinlein Support (30 years in secure communications); hosted on dedicated servers in Germany for 100% data sovereignty
• Scalable from 5 participants (free) to 50 (Standard, EUR 7.50/mo) to 200 (Premium, EUR 12.50/mo) with breakout rooms and sub-room audio whispering for confidential side conversations during meetings
• Professional moderation tools: polls, whiteboard, anonymous voting, roll call, and GDPR-compliant recording with up to 10 GB storage; live streaming via RTMP(S) to YouTube/Twitch
• LiveKit-based media server with adaptive streams and simulcast for efficient bandwidth usage; SIP integration for legacy Cisco Room Kits and desk phones via Obelisk service