The best alternatives to BROSIX are Slack, Telegram Messenger, and Sametab. If these 3 options don't work for you, we've listed a few more alternatives below.
Slack is an application that helps teams communicate and work together by combining messaging, file sharing, and app integrations in one place. It makes it easy for teams to stay connected and work efficiently, whether they are in the office or working remotely.
Collabe is a Team communication tool for modern teams loaded with all essentials features such as direct messaging, group messaging, file sharing, favourites & mentions, Notes. All at cost of ZERO dollar.
Threema is the world’s best-selling secure messenger and keeps your data out of the hands of hackers, corporations, and governments. Threema can be used completely anonymously, allows to make end-to-end encrypted voice and video calls, and offers every feature one would expect from a state-of-the-art instant messenger. With Threema Web, you can also use Threema from your Desktop.
A fast, standalone Telegram app that works without your phone! Send, receive, and see all your messages right from your wrist - even when you don’t have your phone around. Nanogram also supports FlickType Swipe Keyboard, for fast & private replies on the go.