Tuum is a European fintech infrastructure platform that lets financial services companies build, launch and scale digital financial products without needing to rebuild core banking technology from scratch. Rather than forcing clients to choose between legacy systems and risky custom development, Tuum offers a composable, API-first core that handles accounts, cards, payments and compliance out of the box. The platform runs on a modern cloud architecture designed for European regulation, making it particularly valuable for neobanks, fintechs and traditional institutions looking to move fast. What sets Tuum apart is its philosophy of modularity. Instead of locking companies into monolithic solutions, it lets teams plug in best-of-breed providers for specific functions while maintaining a single source of truth for customer and transaction data. This approach has resonated with the European market where regulatory complexity and fragmentation across jurisdictions make standardized solutions risky. Tuum's customer base spans neobanks, embedded finance platforms and regional banks across the continent, many of whom have used the platform to launch products in months rather than years. The company operates in a crowded space—Mambu, Thought Machine and others offer similar infrastructure plays—but Tuum has built particular strength in payment orchestration and multi-entity management, critical capabilities for scaling across European markets. In the broader fintech stack, Tuum represents the infrastructure layer that enables a new generation of financial products by democratizing access to sophisticated banking technology.