November 18, 2016
Founder, CEO, Duo Security Inc.
By Tom Henderson
Duo Security, which was founded in 2010, is one of the fastest-growing and best-funded IT startups in state history, offering what is called two-factor authentication to identify who is trying to access a computer or network to a who’s who of national and international companies, including Facebook, Paramount Pictures, Random House, Twitter and NASA. The company has more than 200 employees, most of them in Michigan, and in April signed a lease for a second downtown Ann Arbor location, 30,000 square feet that will allow it to more than double its current workforce. Duo, which has raised $47 million in venture capital from several firms in Silicon Valley, also has offices in London; Austin, Texas; and San Mateo, Calif. In 2009, Song, now 41 and a member of the 2012 class of Crain’s 40 under 40, founded the Tech Brewery, a co-op/incubator space in Ann Arbor whose venture capital-funded alumni include Deepfield, Sidecar, Sight Machine and QuadMetrics. In 2000 he was one of five self-proclaimed geeks and hackers who co-founded Arbor Networks, a pioneer in internet security that was highly profitable and sold to Tektronix in 2010.