A spotlight on

deceptive design.

Expert witness services for deceptive user interfaces in digital products - also known as "dark patterns".

Harry Brignull

Harry has been exposing deceptive user interfaces since 2010. He runs the website deceptive.design (formerly darkpatterns.org).


Harry Brignull has a PhD in Cognitive Science, and welcomes enquiries about expert witness services in deceptive design.

His critical work and views have already been used by The Wall Street Journal, Vox, The New York Times, The Financial Times, The Verge, Gizmodo, The Atlantic, Fast Company, Ars Technica, Consumer Reports and The Norwegian Consumer Council.

Since 2006, Harry's UX consultancy clients have included Spotify, Pearson, HMRC, Smart Pension, and The Telegraph.

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