HamaraCloud is the SaaS (Software As A Service) venture of Carizen Software Private Limited. Carizen develops and markets Rainmail Server, which is an on-premise Software solution for implementing Network Infrastructure for organizations. Rainmail Server provides the following services. 

and backs it up with Enterprise level features like 

Rainmail Server was launched in 1999 and has been installed in many organizations throughout the world. In 2009, Carizen developed a technology demonstrator platform for providing Security As A Service and launched SAFENTRIX (https://www.safentrix.com) which provided Email Security at an affordable price. In 2016, Carizen partnered with MTNL, Mumbai to provide a complete SaaS solution based on Rainmail Server. This was converted to wholly owned service called HamaraCloud in 2022.