Olvid is described as 'Private messaging for everyone' and is a instant messenger in the social & communications category. There are more than 100 alternatives to Olvid for a variety of platforms, including Android, iPhone, Windows, Mac and Linux apps. The best Olvid alternative is Signal, which is both free and Open Source. Other great apps like Olvid are Telegram, Element, Matrix and Tox.
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.
Kontalk is a secure instant messenger, allowing you to send and receive text, image and voice messages (other file types coming soon) to and from other Kontalk users completely free of charge.
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.
jami-commander (jc for short) is a simple but convenient CLI-based Jami client app for setting up accounts and swarms as well as sending.
Zerion is a secure messaging app and encrypted vault designed for people who need private, anonymous, censorship-resistant communication.
FireFloo is an instant messaging communicator combining the open XMPP standard (Jabber, GMail Chat etc.) with the echo protocol for multi-encrypted messaging. Use various methods to send chipertext over open standards like libgcrypt and encrypt your private communication.
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