Monument Technology Signs Castle Trust Bank in Major BPaaS Platform Deal

UK fintech provider Monument Technology has secured a new partnership with Castle Trust Bank to deploy its cloud-native Banking Platform as a Service (BPaaS), marking a significant milestone for the firm’s expansion in the regulated banking sector.

Under the agreement, Castle Trust Bank will migrate its entire savings business onto Monument Technology’s managed platform. The transition is already underway, with full implementation expected by early 2027. The deal represents Monument Technology’s second major client and its first collaboration with a UK-regulated bank.

The move is part of Castle Trust Bank’s broader strategy to modernize its technology infrastructure and reduce reliance on legacy systems. The bank, which launched in 2012 and gained full regulatory status in 2020, offers a range of savings products—including ISAs—alongside specialist lending through its Omni division. By adopting a unified BPaaS platform that integrates core banking, payments, and customer-facing channels, the bank aims to accelerate product development and improve operational efficiency.

For Monument Technology, the partnership signals growing institutional confidence in its platform and delivery model. The company’s BPaaS solution is designed to evolve collaboratively, with new features and enhancements developed for individual clients being extended across its wider customer base.

The deal follows Monument Technology’s earlier deployment with Ecology Building Society, which provided a live validation of its platform within a regulated environment. The addition of Castle Trust Bank further strengthens its position in the UK’s competitive savings and banking technology market.

Executives from both companies emphasized the long-term strategic value of the partnership. Monument Technology highlighted the platform’s ability to support scalable growth and faster time-to-market for new products, while Castle Trust Bank noted that the migration will enhance its capacity to innovate while maintaining resilience and consistency in its core services.

The agreement reflects a broader industry trend, as financial institutions increasingly turn to cloud-native platforms to modernize operations, improve agility, and remain competitive in an evolving digital banking landscape.