Block, Inc. is a prominent American technology and financial services company founded in 2009 by Jack Dorsey. Known for its leadership in point-of-sale (POS) systems, Block serves 57 million users and 4 million sellers, processing $241 billion in payments annually. The company operates multiple brands, including Square, Cash App, Afterpay, Bitkey, Proto, and Tidal, each offering unique solutions in commerce and finance.

Square is Block's flagship product, providing a comprehensive POS system for businesses to manage payments and operations. Cash App allows consumers to send, receive, and invest money, while Afterpay offers flexible payment options. Bitkey is a self-custody bitcoin wallet, and Proto provides bitcoin mining products. Tidal is a music streaming platform that supports artists. Block's mission is to enhance access to the global economy, and it has a strong focus on integrating cryptocurrency into its services. The company is publicly traded on the NYSE and was added to the S&P 500 in 2025.