SumUp

For years, accepting credit card payments was a privilege reserved for businesses with sufficient volume to justify a contract with a conventional bank, a leased POS terminal, and cost structures that were hard to sustain for small operators. The market stall, the newly opened restaurant, the freelance technician — for these categories, cash remained the only option. SumUp was built to tear down this barrier. Founded by Daniel Klein and operationally headquartered in London, SumUp brought the model of the democratic mobile POS to Europe — a card reader that connects to a smartphone, with minimal activation costs and per-transaction fees with no fixed charges. The message was direct: anyone with a business could accept digital payments, regardless of their size. The numbers reached are proof of the latent demand that existed in this segment: over four million active merchants across 36 countries, with more than one billion transactions processed every year. These metrics position SumUp among the European fintech players with the broadest penetration in the micro-business and independent professional segment — an enormously fragmented market but one with significant aggregate volume. The business model has evolved beyond simple hardware: SumUp has added banking for small businesses, business credit cards, cash flow management, and invoicing tools. The logic follows the neobank playbook for SMEs — building a complete financial ecosystem around the merchant relationship, rather than simply processing transactions. In a market where competition among payment players is intense — from large global networks to emerging neobanks — SumUp found its niche at the lower end of the merchant market, the segment that traditional players had ignored because it was structurally unprofitable under their cost models. Lowering the cost of entry to the point where it is accessible to anyone unlocked a huge market segment and built a loyal customer base for whom the alternative is still cash.