CommonStock's platform allows users to link their brokerage accounts, get real-time alerts on friends' trades, copy trades, invest together, and compete to see who performs best. It is available for free on the web and iPhone, with an Android app coming soon. The company aims to create an engaged and informed community of investors by amplifying insights from top investors and their portfolios. Founded in 2017 by David McDonough, CommonStock is headquartered in San Francisco.