Esurance Inc. is an American auto insurance provider headquartered in San Francisco, California. Esurance has 1,700 employees in 14 offices nationwide. Esurance was founded in 1998 under the name of Silicon Sierra Holdings Inc. by John-Bernard Duler, Jeffrey Goodman, Huyen Bui, David Griffin, and Chuck Wallace. The founding team raised $5.5 million from Palo Alto Ventures, Trinity Ventures, and Stanford University in May 1999 and a $34 million second round of funding from Redpoint Ventures and Global Retail Partners in November 1999. <a href="https://esurance.versaic.com/Login.aspx?ReturnUrl=%2fDefault.aspx">Esurance's sponsorship portal</a> accepts inquiries for sponsorship, brand integration, partnership and cause marketing opportunities.
The US Open Series is the six-week summer tennis season linking 10 ATP World Tour and WTA Tour tournaments together. The Series leads to the US Open. It is often referred to as the U.S. or North American hard court season.