Salesforce.com, Inc. (styled in its logo as salesƒorce; abbreviated usually as SF or SFDC) is an American cloud computing company headquartered in San Francisco, California. Though its revenue comes from a customer relationship management (CRM) product, Salesforce also sells commercial applications of social networking through acquisition and internal development. Salesforce.com's customer relationship management (CRM) service is broken down into several broad categories: Commerce Cloud, Sales Cloud, Service Cloud, Data Cloud (including Jigsaw), Marketing Cloud, Community Cloud (including Chatter), Analytics Cloud, App Cloud, and IoT with over 100,000 customers. Salesforce is the primary enterprise offering within the Salesforce platform. It provides companies with an interface for case management and task management, and a system for automatically routing and escalating important events. The Salesforce customer portal provides customers the ability to track their own cases, includes a social networking plug-in that enables the user to join the conversation about their company on social networking websites, provides analytical tools and other services including email alert, Google search, and access to customers' entitlement and contracts. Source: https://en.wikipedia.org/wiki/Salesforce.com

Zendesk is a vendor of Zendesk CRM (customer service platform). It’s designed for companies that want to create customer relationships that are more meaningful, personal, and productive. We start by helping companies provide great support and then mature with self-service and proactive engagement.