SumUp is a financial technology company that provides payment processing solutions for small and medium-sized businesses. The company offers a range of products, including card readers, online payment services, and invoicing tools, enabling businesses to accept payments in-store, online, or on the go. SumUp is known for its ease of use, affordability, and transparent pricing with no monthly fees. The company is headquartered in London and serves a diverse clientele across multiple countries, aiming to simplify and streamline the payment process for merchants.