The Best European Slack Alternatives in 2025

Why European Slack Alternatives?

Since GDPR, businesses face the question: Can US SaaS tools like Slack be used in compliance? The answer is increasingly uncertain as data transfers to the US are scrutinized.

European alternatives offer:

• GDPR compliance from the ground up
• EU hosting with server locations in Germany, France, or the Netherlands
• Full data control – including self-hosting options

Top 3 European Slack Alternatives

1. Element (Matrix)

Element is based on the open Matrix protocol and is fully open source. Companies can run their own servers – maximum control, zero vendor lock-in.

2. Mattermost

Mattermost is the open-source alternative for teams that want full control over their data. Self-hosting on own servers or in the EU cloud.

3. Rocket.Chat

Rocket.Chat is a European-developed communication platform with many integrations and GDPR-compliant hosting options.

Conclusion

European Slack alternatives are technically mature and often provide better privacy guarantees. Especially for companies with sensitive data, a switch is worthwhile.