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Cisco Duo, formerly known as Duo Security, is a cybersecurity company specializing in multi-factor authentication (MFA), zero-trust security, and secure access solutions. Duo Security was founded in 2010 by Dug Song and Jon Oberheide in Ann Arbor, Michigan. The company quickly rose to prominence for its user-friendly and effective approach to protecting organizational networks and data.
In 2018, Duo was acquired by Cisco Systems, one of the world’s leading networking and cybersecurity companies. Since then, the product has been branded as Cisco Duo, continuing its mission to simplify secure access and strengthen enterprise security posture through innovative identity and access management solutions.
Originally, Duo Security used a lowercase, green wordmark logo that embodied simplicity and approachability. Post-acquisition by Cisco, the brand identity was refreshed while preserving its distinctive green color and minimalist design philosophy. The new logo proudly integrates the “Cisco” name above the stylized "DUO" lettering, signifying the merger of Duo’s core identity with Cisco’s global recognition.
The design is now bolder, cleaner, and more geometric — showcasing evolution while retaining visual continuity for existing users.
The Cisco Duo logo stands out with its uniquely geometric design and use of negative space, aligning with the brand’s values of simplicity, security, and modern innovation.
The word “DUO” is composed entirely of abstract geometric shapes: half circles, rectangles, and arcs. This design choice adds visual intrigue and creates a modular, almost architectural structure — reflecting the robust yet flexible nature of Duo’s security solutions.
Each letter is formed from simple shapes:
These elements create a logo that’s minimalist but highly distinctive, evoking structure and precision — ideal qualities for a security-focused technology brand.
The “CISCO” wordmark at the top is written in a clean, sans-serif font in uppercase, using evenly spaced characters for a modern, tech-savvy look. The typeface complements the blocky style of the "DUO" symbol below without competing for visual attention. It balances brand authority with contemporary appeal.
The logo uses a vibrant green as its primary color, which sets Cisco Duo apart from the typical blues and grays found in the cybersecurity industry. Green symbolizes growth, safety, and trust — all essential values in the context of identity protection and secure access.
This color choice is both friendly and reassuring, helping the brand appeal not only to IT professionals but also to everyday users who interact with Duo's authentication platform.
Cisco Duo’s logo is a wordmark-based logotype with abstract typographic elements, functioning as both a logotype and an emblem. This type of logo is particularly powerful for digital-first brands because it is instantly recognizable even without accompanying symbols or icons.
The Cisco Duo logo is available in high-quality vector formats including SVG, PDF, AI, as well as transparent PNG. These formats are ideal for use in both digital interfaces and print applications, ensuring scalability and clarity in any size or medium. The logo can be downloaded for free on logowik.com, allowing easy access for designers, partners, and developers.
The Cisco Duo logo is a masterclass in modern logo design — minimal, geometric, and bold. It blends abstract artistry with functional design, perfectly reflecting the brand's commitment to simplifying secure access. The green color evokes trust and safety, while the modular construction of the letterforms communicates structure, innovation, and adaptability.
This logo is not just visually appealing but also strategically aligned with Cisco Duo’s brand values: security, simplicity, and user empowerment. It succeeds in standing out in a crowded cybersecurity landscape while staying true to its core identity.
