Apps similar to Trillian include Signal, which is free and open source. Other options are Element, Pidgin, Tox and SimpleX Chat. You're spoiled for choice with Instant Messengers like Trillian: we list more than 100 alternatives for Android, iPhone, Mac, Windows and Linux.
Openfire (formerly Wildfire) is a cross-platform instant messaging (IM) and groupchat server. It uses the only widely adopted open protocol for instant messaging, XMPP (also called Jabber). Openfire is incredibly easy to setup and administer, but offers rock-solid security and...
United States
SafeSwiss The world’s most effective end to end encryption security solution including P2P Voice, encrypted email, encrypted storage, ephemeral text chat, docs share & group chat for mobile phone devices and PC's.
Switzerland
Stack is an Internet launchpad that increases the efficiency of working with the web for the average internet user by allowing simultaneous use of multiple web apps within a neatly organized working environment.
United States
BitlBee brings IM (instant messaging) to IRC clients. It's a great solution for people who have an IRC client running all the time and don't want to run an additional MSN/AIM/whatever client.
France
EU
KakaoTalk is a phone number based messenger service that allows users anywhere in the world to chat one-to-one or in a group for free. (no SMS service)
South Korea
QQ is a widely used Chinese instant messaging service developed by Tencent, offering chat, voice, and video communication. It integrates social networking features like groups, forums, and customizable avatars to enhance user interaction.
China
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.
Radar is a private messenger with built-in Bitcoin payments over the Lightning Network. It is a fork of Signal and keeps Signal's end-to-end encryption. Radar is an independent project and is not affiliated with or endorsed by Signal Messenger, LLC.
United States
RelayBeam is a messaging platform with an innovative multi-port feature for enhanced communication.
This simple Matrix client written in Python allows you to send and receive messages and files, verify other devices, and interact with your Matrix account or other Matrix users in many ways. You use it from the terminal (CLI) or integrate it into other simple Python programs.
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.
United States
