Replaces Slack
European alternatives to Slack
European team chat for everyday work conversation
Browse the category: Team communication services · Community chat platforms
Slack is a team chat service organised around channels, with threads, direct messages, file sharing, search and a large library of integrations that push updates from other tools into the conversation. It has become the default internal communication tool at many companies. Its free plan limits how far back the searchable message history reaches.
Years of channel history hold contracts under discussion, incident notes, customer names and personnel matters, all in one searchable place. Where that archive sits, and who could compel its release, is a fair question for any European organisation. A European alternative to Slack keeps it under EU or EFTA law. Stackfield and Infomaniak kChat are hosted services, Mattermost by Stackhero suits teams that want to run their own, and Wire concentrates on secure messaging.
European options 15
Our pick
mssgs
Group chat for teams and communities from the Netherlands
mssgs is a group chat app for friends, communities and teams, made by Deverence Group B.V. in the Netherlands. It is organised into servers with channels, alongside direct messages and voice calls. Built-in mini-games, custom bots, webhooks and support for MCP and AI agents extend what a server can do, and there are apps for iOS, Android, macOS, Windows, Linux and the web.
NetherlandsEU hostedFree plan
Stackfield
Encrypted team collaboration from Germany
GermanyEU hosted♻
Infomaniak kChat
Swiss team chat from Infomaniak
SwitzerlandEFTA hostedFree plan♻
Infomaniak Public Cloud
Swiss public cloud and virtual private servers
SwitzerlandEFTA hosted♻
Nextcloud Talk
Open source video conferencing inside Nextcloud
GermanyOpen source
Fleep
Team chat from Estonia
EstoniaMattermost by Stackhero
Managed Mattermost chat from France
FranceEU hosted♻
Wire
End-to-end encrypted team messaging from Switzerland
Switzerland
Nozbe
Polish team communication and task app
PolandFree plan
ginlo Business
Business messenger from Germany
Germany
ginlo Private
Personal messenger from Germany
Germany
Private Discuss
Team communication from France with video calls
FranceFree plan♻
Element
Open source team chat built on Matrix
Open sourceOpen sourceSelf-hosted and open source
Open source projects you can run yourself. Not necessarily made in Europe, but nobody else holds your data.
Questions
Can I import my Slack history?
Slack can export workspace data, and some tools can read that export, but the result is rarely a perfect copy. Mattermost by Stackhero and Stackfield are the ones to ask about import paths.
Which European alternative to Slack is closest in feel?
Mattermost by Stackhero uses a channel based layout that Slack users recognise quickly, and Infomaniak kChat is a hosted service with a similar structure. Try both with a small group first.
Do these support calls and integrations?
Nextcloud Talk and Wire include audio and video calls, and Stackfield adds task management alongside chat. Integration catalogues are smaller than Slack's, so check the connectors your team relies on.