Arrington grew up in California, USA and Surrey, England and graduated from Claremont McKenna College with a major in economics. He went on to Stanford Law School and graduated in 1995.[6] He practiced corporate and securities law at O’Melveny & Myers, and Wilson Sonsini Goodrich & Rosati.[7] Arrington was co-founder of Achex, an internet payments company, which was sold to First Data Corp for US$32 million and is now the back end of Western Union online. His other entrepreneurial endeavors include co-founding Zip.ca and Pool.com, acting as chief operating officer for Razorgator, and founding Edgeio.