“The way G was doing it was like taking photos of a Van Gogh painting on his desk all the time and actually we — I mean we were detecting the painting on his desk and we were like okay we can detect any kind of document like that and that's how we said okay maybe we will start doing a document scanning app.”

The demo rig became the product — they were detecting paintings on a desk

Their original idea was to scan museum paintings, but the test rig on the co-founder's desk kept detecting any rectangular document. They followed the accidental capability instead of forcing the original vision — turning a dev-environment quirk into a 15-year business.