Slack logo

European alternatives to Slack

Slack is one of the most widely used team chat services in the world.

It provides a free plan where the number of messages that can be seen in the chat history is limited.

This pages lists European Slack alternatives from companies based in a member state of the European Union (EU) or the European Free Trade Association (EFTA).

Stackfield logo

Stackfield

Germany
Uses renewable energy
EU EU hosted

Stackfield is a team communication service from Germany. It offers end-to-end encryption and apps for many desktop and mobile platforms. It also offers audio and video calls directly in the app.

Fleep is a team communication service from Estonia that offers many integrations and Apps for iOS, Android, Windows, macOS and Linux. They don't offer audio and video calls directly in their application, but they do offer integration with an external tool, so it's easy to start a call from the chat window.

Mattermost by Stackhero logo

Mattermost by Stackhero

France
Uses renewable energy
EU EU hosted

Mattermost is an open-source primary self-hosted team communication service aimed at developers but suitable for all kinds of teams.

Stackhero.io is a France-based managed cloud service provider that offers a managed instance of Mattermost Cloud.

atolia is a team communication service that offers the typical features chat, audio and video calls as well as additional features like shared calendars and project management.

Wire logo

Wire

Switzerland EFTA

Wire is an team communication service from Switzerland with Apps for iOS, Android, Windows, macOS and Linux. The communication is end-to-end encrypted and the apps are open source.

Private Discuss logo

Private Discuss

France
Uses renewable energy
EU Free Plan

Private Discuss is a team communication service from France with a stron focus on audio/video conferences. They also offer instant messaging and apps for all major platforms.

Element is an open source app for team communication. It is end-to-end encrypted and uses the open Matrix protocol. The decentralized Matrix protocol enables communication with Matrix servers and people with other Matrix clients.

Self-hosted & Open Source

Mattermost is an open-source team communication service aimed at developers but suitable for all kinds of teams. It can be selfhosted and offers app for all major platform.

Rocket.Chat is a open source team communication service. They offer many guides for self-hosting on different platforms (Docker, Kubernetes, ect.) and clients for Android, iOS, Windows, macOS and Linux.


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