In-depth profile of Cisco (Duo Security)in Ann Arbor's tech ecosystem
Duo Security is the Ann Arbor tech story. Founded downtown in 2010 by Dug Song and Jon Oberheide, Duo invented modern push-based multi-factor authentication and scaled it into the most trusted identity layer in enterprise security. Cisco acquired the company in 2018 for 2.35 billion dollars, and unlike most post-acquisition stories, the Ann Arbor team stayed, the office grew, and the product kept its teeth.
The technology is deceptively deep. Duo's platform sits in front of millions of logins every hour for Fortune 500 companies, federal agencies, universities, and hospitals. Behind the familiar push notification is a risk engine that ingests device posture, geolocation, behavioral signal, and trust chain state, then decides in milliseconds whether a login gets through, gets challenged, or gets blocked. Duo helped define the zero-trust category and continues to set the direction under the Cisco security portfolio.
The founding team's decision to build in Ann Arbor rather than move to San Francisco shaped the city's identity as a place where world-class security companies can be built. Every later A2 cybersecurity startup, including Censys and Blumira, traces lineage back to Duo engineers, Duo alumni, or the Duo cultural playbook. The 2.35 billion dollar exit also seeded a wave of angel checks into the local startup community and proved to every ambitious founder in the Midwest that scale was possible without relocating.
The Ashley Street office sits squarely in downtown Ann Arbor. Walking distance to Zingerman's Deli, the Michigan Theater, Liberty Plaza, and a dozen coffee shops that double as default meeting rooms for the A2 tech scene. Employees live in Kerrytown, the Old West Side, Burns Park, and Water Hill, none of which are more than a fifteen-minute walk or a short bike ride from the office door.