Knowra Jack Dorsey Jack Dorsey Jack Dorsey is an American technology entrepreneur who co-founded Twitter and the financial technology company Block. He served as chief executive of both companies.
Biz Stone : Biz Stone is an American entrepreneur and a co-founder of Twitter. He co-founded Twitter with Dorsey and helped shape its early culture.
Twitter : Twitter is a social networking service built around short public posts, now called X. Dorsey co-founded the service and served as its founding CEO.
Twitter moderation : Twitter moderation is the enforcement of rules governing posts, accounts, and interactions on the platform. Dorsey’s CEO tenure included high-profile disputes over how Twitter should moderate speech.
Meta Platforms : Meta Platforms is a technology company that owns Facebook, Instagram, and WhatsApp. Meta’s large advertising-driven social networks differ from Twitter’s original public-message focus.
Noah Glass : Noah Glass is an American technology entrepreneur who helped create Twitter. His early work and naming contribution made him central to Twitter’s founding.
Block, Inc. : Block, Inc. is a financial technology company that operates Square, Cash App, and other businesses. Dorsey co-founded the company, originally named Square, and later led it as CEO.
Twitter account suspension of Donald Trump : Twitter permanently suspended Donald Trump’s account in January 2021 after the U.S. Capitol attack. The decision came during Dorsey’s final period as CEO and intensified scrutiny of platform power.
PayPal : PayPal is a financial technology company that operates an online payments platform. PayPal offers a contrasting model for digital payments to Block’s merchant and consumer products.
Evan Williams : Evan Williams is an American technology entrepreneur and a co-founder of Twitter. He helped launch Twitter and later succeeded Dorsey as its chief executive.
Square Reader : Square Reader is a compact device that lets merchants accept card payments through mobile devices. The reader was Square’s early product, inspired by a co-founder’s difficulty accepting card payments.
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