Duo Security is a cybersecurity company founded in 2010 in Ann Arbor, Michigan, by Dug Song and Jon Oberheide. The company focuses on making secure access simple and accessible, particularly for underserved markets. Duo specializes in multi-factor authentication (MFA) and identity security solutions that protect organizations by ensuring that only trusted users and devices can access sensitive data and applications. Duo's product suite includes phishing-resistant MFA, device trust capabilities, risk-based access tools, and identity security solutions. Their cloud-based platform integrates seamlessly with existing IT infrastructure, supporting a wide range of devices and applications. With over 40,000 customers worldwide, including notable organizations like Facebook and Twitter, Duo mediates approximately half a billion logins each month. The company has a strong emphasis on user-centric security, fostering a culture of inclusion and innovation with more than 700 employees across multiple offices.