Deque Systems

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Deque Systems
TypePrivate Company
IndustryWeb Accessibility
HeadquartersHerndon, VA
Area served
Key people
  • Preety Kumar (CEO)

Deque Systems (/ˈdkj/ DEE-kew) is a digital accessibility company based in Herndon, Virginia with additional offices in Kavuri Hills Madhapur, Hyderabad India and Utrecht, The Netherlands.


The CEO of Deque Systems is Preety Kumar.[1][2]

The company was started in 1999 and produces accessibility testing software in addition to offering accessibility consulting services and training.

In June, 2015 Deque open-sourced the accessibility rules engine axe-core.[3]

In May of 2020, the WorldSpace brand name was retired and replaced by axe for each of Deque's products.[4]

In September of 2020, Deque found that the majority of vote by mail applications were inaccessible, and fixed them for the 2020 Presidential Election. [5][6][7][8]

More than 17,000 attendees joined Deque's digital accessibility conference axe-con in March of 2021, making it the largest accessibility conference recorded.[9]


Deque tools, services and training are used to achieve compliance in support of the W3C's Web Content Accessibility Guidelines,[10] the Americans with Disabilities Act, Section 508 and EN 301 549.[11]

axe is a suite of accessibility testing tools for HTML, Android, and iOS applications. Each product in the axe toolkit is powered by the open source rules engine axe-core.[12][13]

Products within the axe suite include: axe Devtools, axe Monitor and axe Auditor.

Deque University is a collection of online accessibility training courses covering a range of topics from introductory level to expert-level International Association of Accessibility Professionals CPACC.[14]