NeoChat is a client for Matrix, an open and decentralized chat protocol. Built with Qt and KDE technologies, it runs on Linux, Windows, macOS, Plasma Mobile, and Android.
End-to-end encryption in the client — mostly implemented in libQuotient — makes NeoChat suitable for private and professional use, and benefits other Matrix clients and bots built on that library as well.
Project page (NLnet): NeoChat.