Zangi

Zangi is a business communication tool built with security, approachability, and utility in mind, a safe place for all your calls, messages and collaboration, which is secured from third-party attempts to hack or outright steal your business communication data. Everything is under your control, hosted on your company servers. It also features modern team features, HD video calling, and low data usage features. This makes it the perfect choice for teams who are used to working in remote conditions and are always on the move.