เปรียบเทียบ CRM open source สองเจ้า Sugarcrm กับ Vtiger

SugarCRM - Sugar OS is an open source CRM application bringing a feature-rich set of business processes that enhance marketing effectiveness, drive sales performance, improve customer satisfaction and provide executive insight into business performance. It is a preferable choice for customers of all sizes across a broad range of industries because of its collaboration and administration capabilities to adapt how their company operates. 

vTiger CRM is an Open Source CRM software appropriate for small and medium organizations. With it you can manage your company wide CRM and Inventory Management activities effectively, including sales force and marketing automation, customer support and service, and procurement. There are many tools and add-ons that will assist you in enhancing your organization's business productivity. Some of them are MS Outlook, MS Office and Thunderbird integration, Customer Portal, RSS and others. 

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http://www.siteground.com/sugarcrm_vtiger.htm