One of the most popular alternatives to Slack is Element, which is open source and free for personal use. Other popular alternatives are Discord, Matrix, Trello and Stoat Chat. You're spoiled for choice with Team Collaboration Tools like Slack: we list more than 100 alternatives for the web, Android, iPhone, Windows and Mac.
AtomJump.com is a well tuned hosted version of the free open-source AtomJump.org. It is free to chat publicly with your family, group or co-workers on your own group.
Balboa is a simple, fast, and uniquely secure collaboration app that encrypts your data before it leaves your computer so only you and your recipients can ever read it. End-to-end encrypted voice, video, messages, and files.
Finland
EU
Nebulynk is a self-hosted team communication platform combining chat, persistent voice channels and voice/video meetings. It includes AI-powered meeting transcription, structured summaries and searchable follow-up through Ask the Meeting.
GermanyEU
Self-hosted collaboration workspace combining synced file storage, secure sharing, office editing, chat, video meetings, project workflows and a no-code app builder. Teams can retain data on their own infrastructure while creating dashboards and reports with business intelligence tools.
LatviaEU
Hub connects, engages and improves your team’s productivity. No need to go back and forth over emails, text or phone calls. Use built-in templates to get the right message out to relevant team members. Track the responses easily, reduce follow-ups and get more done faster!
United States
9mCollab is an organization management tool that enables logically structured, conclusion-driven collaboration. It’s built for organizations and team members to enjoy conclusive discussions and faster decision making with less information noise and distraction.
United States
Team chat, videoconferencing, screen sharing, file sharing, apps builder, process automation, integrations - with Tekos Collaboration & Automation
MyGroupSpace is a shared online workspace for a remote worker and anyone they work with to organise tasks, events, chat messages, posts, notebooks, and files etc.
A decentralized fault-tolerant platform for corporate interaction within companies and for private communication with clients.
Clatter is a free and open source chatting platform for work and casual purposes and is the successor to TeamSpace, another chatting platform but for work only. Clatter is very early in development, so it lacks crucial features, but it has been updated regularly.
