Hello, we’re TetraLogical

We're a company with inclusion at its heart. We specialise in all aspects of accessibility, from working with your websites and apps to giving your teams the skills they need to make accessibility part of everything they do.

We take the time to understand your organisation, your project, and your goals, so we can put together services that are tailored to suit you. Our accessibility services include:

TetraLogical is a member of the W3C where we contribute to standards including HTML, CSS, ARIA, and WCAG.

We're proud to work with organisations including the Scottish Government, Herbal Essences, Google, Babylon Health, Wiley Publishing, and Middlesex University.


Putting real people at the centre of your product development

In celebration of World Usability Day, we’re happy to share more about what we do to support our clients in creating products that are inclusive for people with a range of disabilities, of different ages, from different cultures, and backgrounds.

We can support the development of accessible products according to standards and provide assessments to test they meet the standards but we’ll never truly know if we have got it right unless we ask the people who actually use it what their experience is.

Read more about our approach to user experience including moderated and unmoderated usability testing, agile usability testing, diary studies and focus groups.

Henny Swan joins TetraLogical

Formerly at the BBC, The Paciello Group, Opera Software, and RNIB, Henny has joined TetraLogical as a Director.

Léonie and Ian are delighted to welcome Henny to the team.

Interact London virtual festival

Léonie Watson, Director at TetraLogical, will join Alastair Campbell of Nomensa and Richard Morton of Government Digital Service to talk about "Accessibility, from the trenches to the boardroom", to day at Interact London virtual festival.

Contact us

We like to listen. If you have a project, product, problem, or idea that you want to discuss we can be found at hello@tetralogical.com