Square was founded by Jim McKelvey and Jack Dorsey.
Square started its first design and development efforts in February 2009.
Square was incorporated as Square Inc. in June 2009.
Square purchased the squareup.com domain name in August 2009 and the square.com domain name in November 2013.
Square launched in closed beta in December 2009 and commercially in May 2010.
Square raised about $600 M USD in several rounds of funding.
Square started trading on the NYSE in November 2015.
Square was/is headquartered in San Francisco, USA.
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Jack Dorsey's Square In Action
Jack Dorsey
Jack Dorsey, the idea for Square
Jack Dorsey, show investors a working product
Jack Dorsey: Marketing by Surfacing the Product
Jack Dorsey, payment is a form of communication
Jack Dorsey: One Startup With Many Startups Inside
Form S-1