vTiger CRM Customization vTiger CRM is definitely an open source CRM software, used largely by medium and small-sized companies. vTiger CRM may be used to manage your organization wide CRM and Inventory Management activities, for example sales force automation, customer care & service, marketing automation, procurement & fulfillment effectively. With this experience, Variance infotech team masterfully simplifies vTiger CRM so that it will in compliance with all the demands and procedures of the company.