vtiger CRM is an open source CRM application that was forked from SugarCRM with the intention of being a fully open source CRM application with comparable functionality to SugarCRM and Salesforce.com. It offers reporting, a customer portal and an Outlook plugin in its free edition, whereas those functions are in paid versions of the other CRM applications.
vTiger was launched as a fork of version 1.0 of the SugarCRM project launched on December 31st, 2004.
vTiger is built on the LAMP/WAMP (Linux/Windows, Apache, MySQL, and PHP) stack with code from other open source projects such as SugarCRM. The core development team of vtiger CRM is based in Bangalore, India.
vtiger CRM installation is done entirely from an HTML/PHP web interface. One can install vtiger CRM 4.X and 5.x on a standard webserver from cPanel provided they have the correct version of PHP and mySQL already installed. From 5.x, the package comes bundled with PHP/MySQL installations, fully customisable. The procedure involves downloading the .tar files from the vtiger CRM website and then using the control panel file manager to upload and untar the source files.