What is Siebel? Siebel is a Customer Relationship Management application (CRM). It is mainly used by companies (e.g. Telecommunication, pharmaceutical or Banking sector) which have huge customers and have regular interaction with them. Siebel offers a hybrid model for organizations, giving them the option of working offline, hosted (by Oracle or by client organization) or on premises. (Wikipedia) Founded: 1993, California, United States Defunct: 2006 Headquarters: San Mateo, California, United States Successor: Oracle Corporation Founders: Thomas Siebel, Patricia House Parent organization: Oracle Corporation There are other CRM like Sugar CRM, Microsoft Dynamics CRM and Sales Force CRM. What is CRM (Customer Relationship Management)? (Salesforce) Customer relationship management is an approach to manage a company's interaction with current and potential customers.