Cities are home to an ever-increasing number of social and economic challenges. Historically, these problems have been addressed by governments and non-profits; however, constraints on public finances mean that these organizations alone cannot solve big, complicated urban problems. Here at Tumml, we identify and support early-stage entrepreneurs who are tackling our most pressing city challenges.

So what are those pressing city problems? 

We use a framework of nine urban challenges divided into three categories to better understand how our entrepreneurs are helping cities. This paradigm provides a common framework for evaluating and gauging the impact of urban innovators.

Thoughts? We'd love to discuss. Shoot us a note at