Matrix is described as 'Defines a set of open APIs for decentralised communication, suitable for securely publishing, persisting and subscribing to data over a global open federation of servers with no single point of control' and is a very popular instant messenger in the social & communications category. There are more than 100 alternatives to Matrix for a variety of platforms, including Android, Web-based, Linux, Mac and Windows apps. The best Matrix alternative is Signal, which is both free and Open Source. Other great apps like Matrix are Telegram, Element, Discord and Pidgin.
Dirc is a peer-to-peer web application which uses WebRTC to set up connections between chat participants without requiring a back-end server. The static files can be self-hosted. Other features:
WhatsApp Business enables you to have a business presence on WhatsApp, communicate more efficiently with your customers, and help you grow your business.
Smoke Messenger is an open-source Instant Messenger that is known as the first mobile Messenger worlwide using the encryption algorithm McEliece. To be downloaded at F-Droid.org or Github.com. Smoke provides with its own Server-Software: SmokeStack-Echo-Server.
BeagleIM is a lightweight and powerful XMPP client developed by Tigase, Inc. It provides an easy way to start using the XMPP Protocol (formerly known as Jabber) if you've never used it before. Veterans of the protocol will find many features here they are familiar.
Peer-to-peer messenger with real-time encrypted chat, secure file transfer, retro-inspired lightweight interface, no central servers, and only username and password retained for privacy. Built in C++ using modern cryptography and minimalist resource usage.
Slenke is an internal social network for your company to securely communicate, share files, manage projects, organize tasks, track time and more. View updates and keep track of whats happening at the workplace no matter where you are.
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.
With BiP, you can send pictures and videos, documents, audio files, locations as well as text messages. Holding the microphone button is enough to send the audio recording.?
Selene is a comprehensive peer-to-peer chat and file sharing application built on the Tor network. It enables secure, private communication and seamless file transfers between users, leveraging the anonymity and resilience of Tor.
Prose is a distributed, open-source, and native platform for workplace communication.
Port is a free, open source, privacy-first messaging app designed for the hyper-connected world. Connect safely without sharing phone numbers, emails, or usernames. With Port, yoOR USERNAMEu can chat, call, share, and stay in touch on your own terms.
Twake Chat is a secure, open source messaging platform designed for enterprises. It offers seamless integration of chat, video conferencing, file sharing, and email, and more.
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