Siebel Systems, Inc. began with sales force automation software, then expanded into
marketing and customer service applications, including CRM. From the time it was founded in 1993,
Thomas Siebel, Pat House Siebel's "first experience with sales technology was in the late 1980s, when he worked for Oracle." to try his hand at a startup. In 1992 House left Oracle and together they worked on what became Siebel Systems (in 1993). ==Key dates==