We’re happy to announce that the mosparo spam protection mechanism is tested for full compliance with WCAG 2.1, conformance levels A and AA.

In recent weeks, “Access for all”, the Swiss foundation for technology adapted to people with disabilities, has tested the mosparo spam protection mechanism for compliance with WCAG 2.1 by the W3C.

Access for all confirms that mosparo is fully compliant with all success criteria at levels of conformance A and AA. To verify compliance, Access for all tested with different experts and different technologies and devices.

Since mosparo was built with accessibility and data privacy in mind, the mechanism of mosparo in the frontend is straightforward and, therefore, not a problem for assistance tools like screen readers and other accessibility tools.

Technical details

Access for all tested the visible and invisible modes of mosparo with version 1.1. We prepared an installation of mosparo and a demonstration form for Access for all. We’ve added some rules to test the spam and non-spam scenarios.

Some optimizations, which Access for all found while testing the mosparo spam protection, were already added with version v1.1.2, while some additional optimizations will be added with mosparo v1.2.


We’re planning to go a step further and want to verify the compliance with the success criteria at the level of conformance AAA. We will inform you once we have more information about that project.

Accessibility Conformance Declaration

Accessibility conformance declaration WCAG 2.1 A and AA (PDF, 183 KB)

If you want to help make mosparo better, you can find all information about contributions on our Contribution page. If you find an issue, please report it as an Issue on GitHub. Please let us know in the GitHub discussions if you have any questions or suggestions. We look forward to hearing from you!