Neochat is described as 'client for Matrix.org, the decentralized communication protocol for instant messaging. It is a fork of Spectral, using KDE frameworks, most notably Kirigami, KConfig and KI18n' and is an app in the Social & Communications category. There are eight alternatives to Neochat for a variety of platforms, including Linux, Mac, Windows, Online / Web-based and Android. The best alternative is Element, which is both free and Open Source. Other great apps like Neochat are Matrix.org (Free, Open Source), Syphon (Free, Open Source), SchildiChat (Free, Open Source) and Conduit Chat Server (Free, Open Source).
Element is a secure collaboration and messaging app based on the Matrix protocol. It’s decentralised to deliver digital sovereignty, and based on an open standard for easy connections and interoperability. It is end-to-end encrypted by default.
Matrix 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.