FluffyChat - Open. Nonprofit. Cute ?
CorvisaOne - CorvisaOne is another cloud-based communications suite that is specially designed for companies that need features for managing inbound or outbound call centres.
Signal - Fast, simple & secure messaging. Privacy that fits in your pocket.
Amp Telecom - Amp Telecom is a powerful all-in-one cloud-based business Voice Over IP and calling platform for any kind of midsize and large enterprises that comes with crystal clear calling, 24/7 reliability and can help you save more than 60% off your monthly p…
Molly (Signal fork) - Molly is an independent Signal fork for Android
8x8 X Series - X Series connects teams across channels and around the globe, giving you access your most critical information securely, from any location.