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.
- - Element is the most popular Web-based, Windows, Android & Mac alternative to Jabbin.
- - Element is the most popular Open Source & free alternative to Jabbin.
With the rise of widespread government monitoring programs, Tox is an easy to use application that allows you to connect with friends and loved ones without anyone else listening in.
Linphone is one of the most famous open source softphones in the world. It is fully SIP-based, for all calling, presence and IM features.
Empathy is a messaging program which supports text, voice, video chat, and file transfers over many different protocols. You can tell it about your accounts on all those services and do all your chatting within one application.
Empathy is currently unmaintained. Last version, 3.25, released in August 2017, can be still downloaded from the official website.
ChatSecure is a free and open source messaging app that features OTR encryption over XMPP. You can connect to your existing accounts on Facebook or Google, create new accounts on public XMPP servers(including via Tor), or even connect to your own server for extra security.
Open source Jabber (XMPP) client with multi-account support, clean and simple interface. Being both free (as in freedom!) and ad-free, Xabber is designed to be the best Jabber client for Android .
The project seems no longer developed since 2019. Last version, 2.6.6, released in October 2019, can be still downloaded from F-Droid, it's no longer available on Google Play Store
WeeChat is a free chat client, fast and light, designed for many operating systems. It is highly customizable and extensible with scripts.
Technitium Mesh is a secure, anonymous, peer-to-peer (p2p), open source instant messenger designed to provide end-to-end encryption. Primary aim of developing this instant messenger is to provide privacy which is achieved using cryptography and anonymity using Tor network.
End-to-end encrypted chat, VOIP, and video calling used by millions of people.Discontinued
App hasn't been updated on Play Store since 2020.
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.
The project seems no longer developed. Last version, released in January 2017, can be still downloaded from GitHub