In 2010, Fonstad and Sonja Hoel Perkins were among the founders of Broadway Angels, an angel investing network of senior women from the fields of technology and venture investing.[1][11] In 2014, Fonstad left DFJ to co-found Aspect Ventures with fellow investor and former Bain & Company colleague, Theresia Gouw.[12] With Aspect, Fonstad has made investments in Vida Health, Grokker, FollowAnalytics, OhmConnect and Stem.io.[13]