Microsoft Teams vs OpenTalk

Microsoft Teams brings chat, channels, calls, meetings, and screen sharing together, with guest access and unlimited message history. People can join meetings as guests without a Teams account, and free users can sign in with an email address or phone number without a subscription. Free group meetings and calls last up to 60 minutes; one-to-one calls have no time limit. The free plan lists 100 participants and 5 GB of cloud storage. Teams runs on Android, iOS, Linux, macOS, Windows, and the web. Its listed integrations include Microsoft 365, SharePoint, OneDrive, Outlook, Exchange, Planner, Forms, Power BI, OneNote, Power Apps, Power Automate, and LinkedIn; Teams also has over 250 integrated business apps. Business plans support up to 300 users or people, include encryption for meetings, chats, calls, and files, and can include recordings and transcripts. Business plans list 1 TB per user for Business Basic and 10 GB per user for Teams Essentials. Essentials is $4 a year, billed at $4.00 per user/month, paid yearly; Business Basic is $7 a year, billed at $7.00 per user/month, paid yearly.

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.