ATstake, Inc. (stylized as @stake) was a computer security professional services company in Cambridge, Massachusetts, United States. It was founded in 1999 by Battery Ventures (Tom Crotty, Sunil Dhaliwal, and Scott Tobin) and Ted Julian. Its initial core team of technologists included Dan Geer (Chief Technical Officer) and the east coast security team from Cambridge Technology Partners (including Dave Goldsmith). Its initial core team of executives included Christopher Darby (Chief Executive Officer), James T. Mobley (Chief Operating Officer), and Christina Luconi (Chief People Officer).