smartsheet44Smartsheet already has a slew of notable users, but today the Seattle startup announced a key customer acquisition in the U.S General Services Administration (GSA).

The GSA, which employs more than 12,000 and helps support the basic functioning of federal agencies, will use Smartsheet’s cloud-based online collaboration tool for a bevy of projects and processes.

GSA already adopted Google Apps for its email and calendar systems in 2011, and today’s announcement adds another cloud-based solution to the agency’s ecosystem.

As Forbes notes, this isn’t the best news for Microsoft, which has typically supplied government organizations with its software — including Microsoft Project. Perhaps one draw of Smartsheet for the GSA was the product’s integration with Google Apps, which will allow the GSA to link project management schedules to Google Calendar, Gmail and Google Drive — tools that it implemented three years ago.

Smartsheet, which has more than 45,000 customers including companies like NASA, the Library of Congress, Netflix, and Groupon, raised $35 million this past May. The 8-year-old company has maintained triple digit revenue growth for four years running and plans to double its 120-person workforce in the next 12 months.

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