SumUp | 159,348 followers on LinkedIn. Business made simple | SumUp is a leading global fintech company committed to levelling the playing field for small businesses. Founded in 2012, we’re the trusted partner of over 4 million merchants in 36 markets worldwide, providing simple and affordable tools that enable them to manage payments, business finances and customer relationships. Our diverse team of over 3,000 SumUppers, representing more than 90 nationalities and spread across 20 offices worldwide, is at the heart of our success.