It’s not often that a little app created in just 10 days gets mentioned alongside internet favorites like Twitter and Grumpy Cat. But that’s exactly what happened to Avoid Humans, a mobile site we developed for South by Southwest to help people avoid the insane crowds during the festival. Avoid Humans reverses check-in data from Foursquare and Instagram and shows you the nearest places with the fewest people. It quickly became the talk of the festival and made national headlines. But even more impressive, when visitors left Austin after the festival, they continued using our app in their home cities. With literally zero promotion, Avoid Humans is now used across the country, generating tens of thousands of unique visitors each month.