Tetralogical Services
Accessibility assessments, consultancy, training and usability testing for organisations building websites and apps
Highlights
- New on EvolcAdded 2026-11-05
About Tetralogical Services
TetraLogical is an accessibility consultancy offering assessments, consultancy, documentation, a helpdesk, training courses and user research mentoring. Its Agile Usability Testing service gathers feedback from disabled people within sprint cycles. The company has also open-sourced its Accessible Components Library, including HTML, CSS and JavaScript code, documentation and automated tests.
Its clients are organisations that need to meet accessibility goals for their digital products. A testimonial on the website from the Accessibility Manager at Ubisoft describes collaboration on multiple projects.
The company was registered in 2020 and is headquartered in London; its website states that it was formed in 2019. Its four directors are Léonie Watson, Ian Pouncey, Henny Swan and Steve Faulkner, and the team includes principal and senior accessibility specialists.
Product: Accessibility assessments, consultancy, documentation, helpdesk, training, user research mentoring and Agile Usability Testing.
Jobs at Tetralogical Services
Leadership
- Henny Swan · Co-Founder and DirectorSource: company website
- Ian Pouncey · Co-Founder and DirectorSource: company website
- Léonie Watson · Co-Founder and DirectorSource: company website
- Steve Faulkner · Co-Founder and DirectorSource: company website
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Website technologies
Tools and platforms detected on this company’s website, grouped by purpose. Dates record when Evolc observed them.
Analytics
- PlausibleHigh confidence
- First detected
- Last detected
- Last checked
Detection evidence
- Website resourcedeclared script/iframe or software asset
Hosting
- NetlifyHigh confidence
- First detected
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- Last checked
Detection evidence
- Response headerx-nf-request-id
- Response headerx-nf-request-id
- Response headerx-nf-request-id
Website detection does not establish a paid subscription or company-wide use. Tools loaded after consent or sign-in may be missed. “No longer observed” does not prove the company stopped using a tool.