Sphere, which raised a $4.3M seed as an edtech marketplace, pivots and raised a $21M Series A led by a16z to develop an AI tax compliance software service news techcrunch.com

Dominic-Madori Davis / TechCrunch: Sphere, which raised a $4.3M seed as an edtech marketplace, pivots and raised a $21M Series A led by a16z to develop an AI tax compliance software service  —  As Nicholas Rudder built his last startup, an educational marketplace called ScholarSite, he kept running into the same problem: tax.