Best European alternatives to Slack in 2026

Ano

Developer Tools

EU Based

Ano is a team chat platform that embeds an AI coworker powered by Claude Code directly into every channel. Teams can run commands, generate code, and see results inline alongside familiar features like threads, DMs, and real-time collaboration.

Element

Video Conferencing

EU Based

Element is a secure, decentralized messaging and collaboration platform built on the Matrix protocol. It offers end-to-end encrypted chat, voice, and video calls across all major platforms, with self-hosting options and bridges to tools like Slack and Teams.

Fluxer

Video Conferencing

EU Based

Fluxer is an open-source instant messaging and VoIP platform supporting private DMs, group chats, video calls, screen sharing, and file sharing. It offers self-hosting under AGPLv3, custom CSS themes, moderation tools, and multi-device access across desktop and mobile.

Twake

Project Management

EU Based

Twake is an open-source real-time team collaboration platform combining messaging, file storage, task management, shared calendar, and built-in document editing via OnlyOffice into a single privacy-focused workspace.

Whaller

Project Management

EU Based

Whaller lets organizations build private social networks using isolated 'spheres' for secure team collaboration. Each sphere offers messaging, video conferencing, file storage, co-editing, shared calendars, and Kanban boards.

Matrix is an open standard protocol for decentralized, encrypted real-time communication supporting instant messaging, VoIP, and IoT. It federates across independently hosted servers with no central control, and bridges multiple chat platforms.

Revolt is an open-source, self-hostable chat platform offering channels, direct messaging, and server communities. It provides a privacy-focused alternative to Discord with no tracking or ads.