Salesforce.com spearheaded the cloud CRM platform that can be accessed entirely over the internet without the need for infrastructure. Salesforce.com's CRM service includes Sales Cloud, Service Cloud, Analytics Cloud, Marketing Cloud, and other features. It facilitates case management, task management, and automatic routing. Salesforce.com has over 43,000 customers and attributes its success to its software-as-a-service model and ease of use. However, it faces challenges from increased competition from Microsoft, SAP, Oracle and others replicating its model.