Key Points:
- Intesa Sanpaolo completed the massive migration of over 800 core banking applications to Google Cloud infrastructure.
- The bank retired and decommissioned an equivalent of more than 800 legacy systems from its physical premises without any major operational incidents.
- The applications run on two local Google Cloud regions in Turin and Milan, fully satisfying strict European data residency regulations.
- Telecom Italia (TIM) managed the end-to-end infrastructure governance, utilizing FinOps monitoring to ensure strict cost control.
A monumental milestone in the digitization of European financial services has officially reached its conclusion on Italian soil. Intesa Sanpaolo, Italy’s largest banking group, announced the successful completion of a massive cloud migration program that has transitioned its core IT systems to public cloud infrastructure. Carried out in close collaboration with Telecom Italia (TIM) and Google Cloud, the massive initiative successfully migrated more than 800 mission-critical banking applications. This comprehensive technological overhaul successfully establishes a faster, highly secure, and artificial intelligence-ready foundation, positioning the financial giant to deliver next-generation digital services at a fraction of its legacy operating costs.
The physical scale of this digital transformation represents an extraordinary engineering feat. To make room for the modern cloud architecture, the bank systematically retired and decommissioned an equivalent of more than 800 physical legacy applications and mainframe systems from its corporate headquarters. What makes the achievement particularly impressive is that the transition team executed this massive, high-volume migration without recording a single major operational incident or system outage. This seamless transition ensured absolute business continuity for the bank’s 12 million active digital customers, who continued to access their accounts, execute payments, and trade securities without experiencing any service lag.
A primary structural hurdle that the partnership had to overcome was satisfying the exceptionally strict data residency and technological sovereignty regulations mandated by Italian and European Union financial authorities. To ensure that sensitive customer financial data lives strictly on national soil, the partners deployed the bank’s core systems across two newly established Google Cloud regions physically located in Turin and Milan. These cloud regions are hosted inside TIM’s state-of-the-art local data centers. This localized hosting arrangement gives regulators something they can verify with absolute precision: customer data that remains fully compliant with European Union sovereign data protection laws.
The successful completion of this migration, internally codenamed “Project Skyrocket,” represents the culmination of a multi-year investment campaign. Originally launched under the bank’s 2022-2025 business plan, the cloud-first strategy laid the foundation for the bank’s new digital-only bank, Isybank. Powered by “Isytech,” a highly scalable, cloud-native core banking engine developed in partnership with fintech company Thought Machine using its Vault Core system, the digital bank was built and launched in just 12 months. Having successfully tested the cloud-native infrastructure with over 300,000 active retail accounts, the group began migrating its core private banking, wealth management, and commercial operations onto the same platform.
Operating a massive, multi-region cloud network requires highly disciplined governance and continuous financial oversight. To prevent the out-of-control operational expenses that frequently plague large-scale cloud adoptions, Telecom Italia managed the end-to-end governance of the new infrastructure. TIM integrated a methodical “FinOps” (Financial Operations) monitoring framework, allowing the bank’s technology teams to track computing usage, optimize server allocations, and enforce strict, real-time cost controls. This proactive financial management ensures that the company can scale its computing capacity up or down dynamically while maintaining strict alignment with its corporate budgetary targets.
The timing of the project’s completion is highly strategic, marking the perfect transition to the bank’s next major corporate phase. Massimo Proverbio, the Chief Data, AI, Innovation, and Technology Officer at Intesa Sanpaolo, confirmed that completing the migration has successfully delivered all the key technology goals outlined in its previous industrial plan. Proverbio emphasized that the newly modernized, highly agile infrastructure will serve as the primary launching pad for the challenges and opportunities of the bank’s upcoming 2026-2029 business plan. The unified, data-dense cloud platform will enable the bank to deploy advanced, generative artificial intelligence and autonomous agentic systems at an industrial scale.
A major competitive advantage of the completed migration is that it makes the bank’s entire data estate immediately AI-ready. By consolidating its data warehouses onto Google Cloud’s BigQuery, the bank has eliminated the fragmented data silos that historically slowed down advanced analytics. The technology teams have already utilized this unified data access to scale up its “Democratic Data Lab,” a specialized artificial intelligence sandbox used by the bank’s risk management teams. This data lab leverages Google Cloud’s advanced machine learning models to analyze complex financial market movements, monitor credit risks, and detect sophisticated financial fraud in real time at a fraction of the time required by legacy mainframe systems.
Intesa Sanpaolo’s successful migration reflects a broader, accelerating global trend of legacy banks abandoning their historical mainframe systems to survive in the digital age. For decades, established financial institutions viewed their legacy mainframes as indestructible, highly secure systems that were simply too risky to alter. However, as agile fintech challengers and digital-only neo-banks continue to capture younger consumers by offering seamless, real-time omnichannel services, traditional players must modernize to survive. By proving that a major, systemic European bank can successfully migrate 800 of its core applications without disruption, the Italian group has established a highly repeatable blueprint for the global banking sector.
Ultimately, the successful partnership between Intesa Sanpaolo, Google Cloud, and TIM demonstrates that the future of banking lies in secure, localized cloud infrastructure. While software developers can easily write advanced financial algorithms, running those systems reliably for millions of customers requires massive, compliant, and highly secure physical data centers. By combining local sovereign hosting with advanced FinOps cost controls and cutting-edge database technology, the partners have built a highly resilient, future-proof financial engine. As the bank begins its next major business cycle, its newly modernized cloud platform will ensure it remains at the absolute center of global financial innovation for the next decade.
