Jack Dorsey, CEO of Square and CEO of Twitter, and Jim McKelvey, co-founder of Square, applaud as NYSE President Tom Farley fist bumps Mac Riley after the IPO of Square Inc., in New York From tech companies like PayPal to big banks like Bank of America, everyone seems to be gunning for a piece of Square's business. But Square CEO Jack Dorsey says there's one major difference between his company and the rest of the competition that makes it better: its suite of services that cover everything from lending to analytics.