About Deque Systems, Inc.

Digital equality. It's our mission, our vision, and our passion.

Organizations come to Deque to help them achieve sustainable digital accessibility at scale. Powered by AI and the brightest minds in the industry, we help perform speedy audits, unparalleled training and testing tools that dev teams love to adopt.

We have helped thousands of companies from technology leaders like Google and Microsoft, to many large US banks and insurance companies, retailers, airlines, hotel chains, and the biggest government agencies “shift left” to practice sustainable digital accessibility.

Let us help your teams make your website and mobile apps accessible.

Deque Memberships and Certifications

Let’s broaden your customer base and make practicing accessibility easy at the same time.”

Preety Kumar CEO, Deque Systems

Our position in the industry

Earned developer respect

With 875,000+ installed extensions, Deque tools are highly adopted and regarded.

Most certified practicing experts

Deque experts hold a collective 145 CPACC, WAS, & CPWA certifications issued by the IAAP. More than any accessibility testing company in the world.

Most standards contributors

15 Deque employees work in W3C Accessibility Working Groups, shaping the future of digital accessibility testing.

World class training

Deque University’s world-class digital accessibility training boasts 140,000+ subscribers.

A11y for Good logo

Our Contributions to the Accessibility Community

The accessibility community was collectively struggling to agree on a common accessibility testing ruleset. We decided to make ours open source in 2015 and have since seen 1 Billion+ downloads as it’s made its way to becoming the standard of the industry. Coupled with a free browser extension, axe® is used by 275,000+ weekly active users, helping make the web a better and more accessible place for everyone.

Another area of importance for us is in helping drive global accessibility standards forward. Deque donates time from our top experts to contribute to WCAG standards working groups with the W3C.

In addition to our open source work, Deque offers accessibility course scholarships for people with disabilities on Deque University.

Our Team

Everyone on the Deque Team shares a passion for providing equal access to the web regardless of ability.  We have helped develop international accessibility guidelines in W3C working groups, and many of our Subject Matter Experts spent years working inside large Fortune 500 companies on accessibility before joining the Deque team.

Various Deque employees posing and smiling together in a group photo.

Stay Connected

Sign up to receive updates about Deque events, webinars, content, and products.

To subscribe, simply select the subject areas that are interesting to you, and provide us with your email address.



North of Coppermine Rd, East of Sunrise Valley Dr.

13800 Coppermine Road, Herndon, VA 20171

Deque Systems Europe B.V.

Deque Europe, West of ICE104

WTC Utrecht, Stadsplateau 7, 3521 AZ Utrecht, The Netherlands

Deque Software Private Limited

Google map of Deque Software Private Limited, near intersection of Hitech City Rd and Kavuri Hills Rd, opposite lane to Madhapur Police Station

Plot No: 119 Ivy Terrace Kavuri Hills Madhapur Hyderabad – 500033 Telangana, INDIA

  • GSA Contract Holder logo
  • Certified WBEN Women’s Business Enterprise logo
  • Carolinas-Virginia Minority Supplier Development Council logo
  • W3C – World Wide Web Consortium logo
  • IEEE logo
  • ACM – Association for Computing Machinery logo
  • AFCEA logo
  • IAAP – International Association of Accessibility Professionals logo
  • ISO 27001 logo