Twitter Buys Chat App Founded by a Serial Entrepreneur Who Sold His First Start-Up to Yahoo When He Was 17 - NewsBreak

Incorporated in 2016, Sphere started out as a real-time question and answer app that involved micropayments before it pivoted to become more of a group chat app. It raised around $30 million over three funding rounds from investors including Index Ventures, Airbnb co-founder Brian Chesky, Tinder co-founder Sean Rad and Sequoia venture capitalist Mike Moritz.