Jack Dorsey is an American tech entrepreneur who serves as CEO of Block, Inc., the financial technology company that owns Square, Cash App, Afterpay, Bitkey, and Tidal. He co-founded Twitter, Inc., which operated the Twitter social media service, and also co-founded the microblogging platform Bluesky. Earlier in his career, his work building payment and messaging tools led to the creation of Square, which later became part of Block. At Block, he has continued to expand the company's product lineup, including the launch of Buzz, an open-source group chat platform designed to let AI agents work alongside humans within team workflows. He is known for founding and leading several major technology and financial platforms across social media and fintech.
Updated 6 August 2026
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2026
Block launches Buzz, an open-source collaboration platform for humans and AI agents Product launch
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- Block founded by this person · 1 source