One of the most popular alternatives to Mattermost is Element, which is open source and free for personal use. Other popular alternatives are Discord, Matrix, Stoat Chat and Slack. You're spoiled for choice with Group Chat Apps like Mattermost: we list more than 100 alternatives for the web, Android, iPhone, Windows and Mac.
Conduit is a simple, fast and reliable chat server powered by Matrix. Conduit is an alternative to Synapse and tries to be lightweight and easy to install, but it is still in development.
Priority Matrix software helps managers prioritize, focus, and work smarter. It allows you to seamlessly communicate team priorities and keep track of the moving parts of your projects, promoting accountability and clarity across multiple platforms.
United States
kChat is a secure instant messaging for businesses, which makes it possible to discuss matters live and organise projects.
Switzerland
Ryver provides all of your team communications in one place: chats, posts, and files. Invite as many team members and guests as you need.
United States
Teams.cc is a communication application for increasing team collaboration that you can install on your PC or mobile device. This software has the ability to revolutionize the way you collaborate due to its unique functionalities.
hack.chat is a minimal, distraction-free chat application. Channels are created and joined by going to https://hack.chat/?your-channel. There are no channel lists, so a secret channel name can be used for private discussions.
Source code : https://github.com/hack-chat/main.
United States
Kahla is a free and open-source, cross-platform business messaging tool that supports end-to-end encrypted message communication and automatic destruction of messages.
Open source encrypted group-chat platform focused on privacy and efficiency, featuring Rust-based backend for speed, customizable interface, minimal data collection, real-time messaging, community-driven improvements, and ergonomic design for various use cases.
United States
Roomy creates rooms of sociality. Digital places for friends and collaborators to hang out in. Roomy is a lot more than 'group chat', but we do believe group chat is minimum viable everything, as it's the best default foundation for greenfield community building and...
0xchat is a secure chat app built on the Nostr protocol. It prioritizes security, featuring private key login, encrypted private chats and contacts, encrypted group chats.
Real-time chat platform structured with threads, custom feeds, project tagging, and AI moderation. Provides privacy controls, instant file and code sharing, multiple viewing modes, moderator tools, light/dark modes, and unifies collaboration for organizations and communities.
United States
