European Alternatives to Salesforce Slack
Slack (now owned by Salesforce) is the most popular team chat platform. All messages, files, and integrations data is processed on US infrastructure.
Why switch from Slack?
- Owned by Salesforce — all data under US jurisdiction and CLOUD Act
- Free tier severely limited (only 90 days of message history)
- European alternatives offer end-to-end encryption for sensitive communications
- German-made alternatives like Stackfield are specifically built for GDPR compliance
Best European Alternatives to Slack
Stackfield
🇩🇪 Germany, MunichStackfield — European alternative
- End-to-end encrypted team chat, tasks, and files — not even Stackfield can access content
- Integrated task and project management with Kanban boards, Gantt charts, and to-do lists
- Built-in audio and video conferencing with screen sharing
Threema Work
🇨🇭 Switzerland (non-EU but European), Pfaffikon SZThreema Work — European alternative
- End-to-end encrypted messaging, voice messages, and group chats with zero-knowledge architecture
- No phone number or email address required — anonymous identity via Threema ID
- EasyConnect feature lets external contacts join secure channels by scanning a QR code
Wire
🇨🇭 Switzerland (non-EU but European), ZugWire — European alternative
- End-to-end encrypted messaging, voice calls, and video conferencing using MLS encryption
- Encrypted video conferences supporting up to 150 participants across web, desktop, and mobile
- Guest rooms allowing external collaborators to join via browser without an account
Fleep
🇪🇪 Estonia, TallinnFleep — European alternative
- Persistent conversation threads that bridge team messaging and email in a single inbox
- Email integration allowing non-Fleep users to participate in conversations via standard email
- Per-conversation Pinboard for pinning decisions, links, and notes that remain visible alongside the chat
Nozbe
🇵🇱 Poland, GdyniaNozbe — European alternative
- Task-based communication model where all team discussions happen as comments on tasks, eliminating scattered chat
- Shared projects with task assignment, due dates, priorities, and section-based organisation
- Recurring and repeating tasks with flexible scheduling for regular workflows
Infomaniak kChat
🇨🇭 Switzerland (non-EU but European), GenevaInfomaniak kChat — European alternative
- Public and private channels for organising team and project communication with granular access control
- Integrated audio and video calls and video conferencing within channels and direct messages
- Unified messaging hub combining internal team chat and external communication flows in one interface
How They Compare to Slack
| Product | Country | Open Source | Free Tier | Founded |
|---|---|---|---|---|
| Slack | US | No | Varies | — |
| Stackfield | 🇩🇪 Germany | No | Yes | 2012 |
| Threema Work | 🇨🇭 Switzerland (non-EU but European) | Yes | No | 2012 |
| Wire | 🇨🇭 Switzerland (non-EU but European) | Yes | Yes | 2012 |
| Fleep | 🇪🇪 Estonia | No | Yes | 2013 |
| Nozbe | 🇵🇱 Poland | No | Yes | 2007 |
| Infomaniak kChat | 🇨🇭 Switzerland (non-EU but European) | No | Yes | 1994 |
Frequently Asked Questions
What is the best European alternative to Slack?
Stackfield (Germany) is the most feature-rich alternative with channels, video calls, and task management — all end-to-end encrypted. Wire (Switzerland) is strong for security-focused teams.
Is Slack GDPR compliant?
Slack offers GDPR features but operates under US jurisdiction via Salesforce. European alternatives store and encrypt all communications within EU/Swiss infrastructure.
Migration guide coming soon
We're building a step-by-step guide for migrating from Salesforce Slack to European alternatives. Sign up to be notified when it's ready.
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