Carizen (formerly ICSoft) was started in 1998 to provide Linux based Network Infrastructure solutions to Corporates.

One of the pioneers in the area of Linux in India, Carizen recognized the void that needs to be filled to make Linux a viable proposition. Carizen's first product, Rainmail Intranet Server, aimed at filling the void so that Corporate customers can start using Linux.

Rainmail Intranet Server gained acceptance after breaking many myths and overcoming difficult challenges. To realize the potential of Rainmail Intranet Server, Carizen opened branches in many cities and built a comprehensive partner and support network. In fact, Carizen is the only Linux company in India that has multiple support locations!

Rainmail Intranet Server still forms the backbone of sales at Carizen, though many more products have been launched, aimed at different segments of Industry and Government.