OpenTalk vs Microsoft Teams
Last updated October 2026
Looking for a European alternative to Microsoft Teams? Here's how OpenTalk compares, on EU hosting, GDPR and what it does.
Our pick for a European buyer: OpenTalk. We weight data residency, GDPR and EU jurisdiction above everything else — that is the constraint this directory exists to solve.
What it is
Open-source video conferencing from Germany, built for public authorities and regulated sectors
Unified communication and collaboration platform for chat, meetings, calling, and file sharing.
Headquarters
🇩🇪 DE
🇺🇸 US · 1975
EU data residency
Yes, for all customers
Available on some plansEU/German data residency is available for eligible tenants under Microsoft’s EU Data Boundary commitments and Advanced Data Residency options.
DSGVO / GDPR
Yes
Yes
Certifications
No
ISO 27001, ISO 27018, SOC 1 Type II, SOC 2 Type II
Price from
€7.50/user/mo
$2.25/user/mo
Free plan
Yes
Yes
Open Source
Yes
No
Integrations
innovaphone App Store, Outlook (Premium plan plug-in), ownCloud, Manufacturing software systems (MRP, MES, ERP)
No
Where each one wins
OpenTalk
Strengths
- +Strong GDPR compliance and strict data protection with servers located in Germany
- +Comprehensive core feature set including chat, direct messaging, surveys, voting, and virtual workshops
- +Supports diverse communication needs for businesses, educational institutions, and public sector organizations
- +High trust among users due to transparent data handling and EU-based hosting
- +Reliable for standard video conferencing and team collaboration scenarios
Limitations
- −User interface perceived as less polished and intuitive compared to major competitors
- −Onboarding and initial setup may require more effort or clearer guidance
- −Occasional performance issues or system responsiveness reported
Microsoft Teams
Strengths
- +Seamless integration with Microsoft 365 apps
- +Reliable performance for large-scale deployments
- +Comprehensive admin and compliance tools
- +Strong collaboration features for remote teams
Limitations
- −Steep learning curve for advanced features
- −Complex licensing and pricing structure
- −Occasional performance issues with large meetings
- −Limited customization for non-Microsoft integrations
Data residency & compliance
OpenTalk
Microsoft Teams
EU data residency
Yes, for all customers
Available on some plansEU/German data residency is available for eligible tenants under Microsoft’s EU Data Boundary commitments and Advanced Data Residency options.
Transfer mechanism
Not required — data stays in the EU
Standard Contractual Clauses
Certifications
No
ISO 27001, ISO 27018, SOC 1 Type II, SOC 2 Type II
Pricing
OpenTalk
- Starter Free per user / month10 conference rooms · Up to 5 participants · 30-minute max call length
- Standard €7.50 per user / monthUnlimited conference rooms · Up to 50 participants · 240-minute max call length
- Premium €12.50 per user / monthUnlimited conference rooms · Up to 200 participants · Unlimited call length
- Custom On request Custom features · On-premises hosting option
All prices exclude VAT. Annual billing available at a lower rate.
Microsoft Teams
- Microsoft Teams Free Free No time limitLimited meeting duration · Limited cloud storage · Basic chat and collaboration
- Teams Essentials $4.00 Per user per monthUnlimited group meetings up to 30 hours · 10 GB cloud storage per user · Anytime phone and web support
- Microsoft 365 Business Basic with Teams $6.00 Per user per monthWeb and mobile versions of Office apps · 1 TB cloud storage per user · Standard security and compliance features
- Microsoft 365 Business Standard with Teams $12.50 Per user per monthDesktop versions of Office apps with premium features · 1 TB cloud storage per user · Advanced security and compliance features
- Microsoft 365 Business Premium with Teams $22.00 Per user per monthAll Business Standard features · Advanced threat protection · Device management and security
- Microsoft 365 F1 with Teams $2.25 Per user per monthFirstline Worker-focused features · Limited Office app access · Basic security and compliance
- Microsoft 365 F3 with Teams $8.00 Per user per monthFirstline Worker-focused features · Full Office app access · Advanced security and compliance
Prices are per user per month and may vary by country and currency. Confirm local pricing and terms with Microsoft.
Features
OpenTalk
- Conference Management
- Scheduling conferences via dashboard, Invitation function with integrated address book, Access restrictions for participants, Multi-person moderation
- Communication & Interaction
- Video and audio conferencing, Chat and direct messaging, Breakout rooms for group discussions, Interactive whiteboard
- Recording & Streaming
- GDPR-compliant conference recording, Streaming (Premium plan)
- Accessibility & Connectivity
- Telephone dial-in for participants with poor internet connection
- Data Protection & Compliance
- GDPR-compliant operation in German data centers, Data processing agreement included
Microsoft Teams
- Chat and messaging
- Individual, group, and channel conversations, Persistent chat history, Rich text formatting and file sharing, Messaging APIs for custom integrations
- Meetings and collaboration
- HD video and audio meetings, Screen sharing and whiteboard, Meeting recordings and transcripts, Team workspaces with file collaboration
- Calling
- Teams Phone with PSTN connectivity, Calling Plans, Operator Connect, or Direct Routing, Voicemail and call queues, Call analytics and reporting
- Administration and compliance
- Centralized admin center for user and policy management, Data loss prevention (DLP) and retention policies, eDiscovery and legal hold, Audit logs and compliance reports