Read more about Erin Esurance at: Wikipedia Official Site: Esurance Esurance Inc. is an American auto insurance provider headquartered in San Francisco, California. Esurance was founded in 1998 under the name of SiliconSierra Holdings Inc. Esurance launched its Web site and started writing personal auto insurance in December 1999. In 2000 Esurance was acquired by Folksamerica Holding Company, Inc. (a subsidiary of White Mountains Insurance Group). Esurance is now a direct subsidiary of White Mountains. In 2008, Esurance policies in force decreased by 5%. As of 2009, Esurance offers auto insurance in 30 states.
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