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.
nospeak is a decentralized Nostr chat client for secure, private messaging. It is easy to use but has state of the art end-to-end encryption without metadata leakage.
Germany
EU
Extendable cloud-based team communication and business collaboration app that you can easily host on your own Private Cloud Server if you want. Also available on iOS and Android devices.
United States
Moxtra provides cloud-based project binders for managing, presenting and sharing your projects/events/parties/trip... from your iPhone/iPad.
United States
Private and Secure Instant Messenger for Office designed specifically for keeping remote employees and multiple offices in sync.
"Give your team the freedom to chat, talk, share and interact together from anywhere, on any devices" by using it.
India
WorkDo is an all-in-one app to make teamwork effortless with features that allow you to collaborate easily with your teammates. It is specifically designed to make business management a breeze.
United States
Kwayet is an internal communication app exclusively for your team or workplace. You can collaborate, call and message anyone without requiring a phone number.?
ChatWork is a group chat app for business. Secure messaging, video chat, task management and file sharing. Real-time communication and increase ...
United States
Zero Knowledge, end-to-end encrypted collaboration tool for teams and businesses. Reviewable source code. Python wrapper for bots & integrations. Encryption white paper. Native offline mode. Faster file-sharing. Built for enterprise.
United States
United States
An IRC-like internet chatroom hosted on ZeroNet, a distributed network. 0rc is a fully distributed website, and messages are shared through peers using the ZeroNet stack. In addition, making a new chatroom website is a simple as downloading the files and cloning the site.
Zangi for Business is a secure communication platform that offers top-level security technologies to ensure data security.
United States
