Memberships & Engagement
For many years, we have been actively involved in national and international associations, working groups, and standards-setting bodies. Together with partners from industry, academia, and the accessibility community, we continue to develop standards, promote the exchange of knowledge, and drive digital accessibility forward in a sustainable manner.
Standardization and Expert Committees

PDF Association
As a Partner Member of the PDF Association, we are actively committed to the further development of PDF technology and international standards for accessible documents.
Our commitment goes far beyond mere membership:
- Markus Erle is Chair of the PDF Accessibility Liaison Working Group.
- The working group develops the "Techniques for Accessible PDF" and supports the practical implementation of new standards.
- Other team members participate in various working groups of the PDF Association.
- We are also active in the PDF/UA Technical Working Group and other expert committees.
Make ISO Standards Freely Available
Accessibility should be available to everyone.
That is why axes4 is sponsoring the publication of the ISO standards for PDF accessibility. As a result, the PDF/UA standards, among others, are available worldwide free of charge.
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Accessibility Community

IAAP (International Association of Accessibility Professionals)
IAAP stands for International Association of Accessibility Professionals and is the professional association for experts in the field of digital accessibility. It consists of a global umbrella organization (IAAP Global) and several regional branches, known as “chapters.”
axes4 is a founding member and serves on the advisory board of the German-speaking branch of the IAAP, IAAP D-A-CH. Together with accessibility experts from around the world, we are committed to professionalizing this exciting field and advancing the areas of awareness-raising, knowledge exchange, networking, training, and certification. Selin Erle and Markus Erle are active in the Communication Working Group.
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Alliance for Digital Inclusion in Switzerland
axes4 is a founding member of ADIS.
Together with companies, organizations, and public institutions, we are committed to promoting digital accessibility in Switzerland in a sustainable manner and raising public awareness of the issue.
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German UPA
Our CEO, Markus Erle, has been actively involved in the fields of usability and digital accessibility for many years and is a member of the German UPA’s Accessibility Working Group.
This network bridges the gap between accessibility and user experience and helps ensure that digital products are designed to be usable by everyone.
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Advocacy & Digitalization

bitkom
As a member of Bitkom, we contribute our expertise to Germany’s largest digital association.
We participate in the Accessibility Working Group, where we monitor current developments related to digital accessibility, legislation, and digitization.