Rearden Commerce sells a Web-based "virtual personal assistant" application that smoothly integrates hotel and flight reservations, meetings, and other events into your daily agenda. Some 150 companies and 500,000 employees use Rearden's software.
Funding: $100 million (American Express, Foundation Capital, Vinod Khosla, Burt McMurtry, Oak Investment Partners)
Founder & CEO: Patrick Grady (shown right)
Headquarters: Foster City, Calif.
Business model: Subscriptions
Bragging rights: Approx. 200 customers; new partnership with American Express
Next up: Expanding into the mobile market
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