Nextcloud Talk vs OpenTalk

Nextcloud Talk combines meetings, chat, and webinars in a self-hosted communication service. It supports private, group, and public calls, URL invitations for external participants, and chat that remains after calls. Users can share Nextcloud Files documents and connect rooms with files, calendars, and tasks. Federation links chats and calls across Nextcloud servers, while bridges connect services such as Slack, Microsoft Teams, Matrix, IRC, Mattermost, and XMPP. Talk runs in browsers and on Windows, macOS, Linux, iOS, and Android, with a public API for app integrations. Security features listed include end-to-end encrypted calls, layered encryption, brute-force protection, suspicious-login detection, and a $10,000 bug bounty. Typical private deployments handle 6–10 participants, or up to 20 without video. Webinars, lobby-based public video conferences, SIP dial-in, and larger calls require the High Performance Backend.

OpenTalk is a browser-based video conferencing service available as a hosted service or for installation in a customer's data center. It runs in common browsers without local software, although Safari on Apple devices has functional limitations. Meetings can use breakout rooms and sub-room conversations, with multiple moderators, a whiteboard, meeting minutes, polls and surveys. Open and secret voting are supported, with results documented. Participants can join by phone for audio-only access, and OpenTalk can connect to in-house phone systems or external SIP providers. Open APIs support integrations, and Keycloak is an identified single sign-on option. Its on-premises APIs cover user and room provisioning, configuration, metrics and reporting. OpenTalk describes itself as open source and GDPR-compliant, and reports receiving the German Federal Office for Information Security IT security label for video conferencing services. Starter is free, with up to five participants and 30-minute calls, but no recording. Standard is $7.50 a month per user, excluding VAT; Premium is $12.50 a month per user, excluding VAT. Both paid plans include recording.