Analysts polled by First Call expected the software developer to earn 15 cents a share in the quarter on sales of $536 million.
Siebel shares closed up 88 cents to $78.50 ahead of the earnings report.
The $581.6 million in sales represents a 111 percent surge from the year-ago quarter when it pocketed $39.2 million, or 8 cents a share, on sales of $275.9 million.
Strong sales of its customer relationship management software helped Siebel top even the most optimistic estimates for the quarter.
Last quarter, the company also blew past analysts' estimates, earning $71 million, or 14 cents a share, on sales of $480.9 million.