Two years after it was quietly started by veterans of Seattle's Qpass, online document handling startup Doxo is unveiling its service and opening it up to interested users.

Doxo is building a sort of secure online file cabinet for consumers to store and manage bills and documents such as bank statements and medical benefit statements. Consumers can use the service for free, while companies will pay Doxo to electronically deliver documents for a price less than paper mail.

The cost for companies using Doxo instead of mail varies, but the company is pitching itself as a way for them to save more than 80 percent of the cost of paper mail.

On the site, essential information - such as a bill's due date and amount - are displayed for consumers, along with a button to click and display a PDF version of the original document. Documents can be exported from the site and printed or saved to a computer.

Starting Wednesday, Doxo is launching its consumer service on an invitation basis, meaning that people can submit their name to Doxo and it will dole out access as it ramps up the service.

Doxo raised $5.25 million from Mohr Davidow Ventures and Bezos Expeditions, the personal investment company of Amazon.com founder Jeff Bezos.

A screenshot of the Doxo console: