Duo Security is opening a new office in Downtown Detroit, expanding from its headquarters in Ann Arbor, Michigan . The company will immediately relocate 30 team members to a shared space in Bamboo Detroit in the Madison Building and by the end of the year, plans on moving into a 9,000 square foot space to accommodate additional employees. This is a big win for Detroit. Duo Security is one of the hottest security startups in the space and arguably one of the largest in the state of Michigan.