• Partners process complex, mass migration at speed, completing within seven months (a fraction of the industry range) whilst ensuring continuity and protection for investors
• Completion establishes the partners as a credible, proven alternative to UK market’s over-reliance on industry incumbents

London, 11th OF September 2025: The Children’s ISA (TCI), the UK’s specialist provider of children’s ISA products, has migrated all 126,000 of its ISA and Junior ISA (JISA) accounts from Embark (FNZ) onto Quai Digital’s platform, which utilises WealthOS technology at its core. The move is believed to be one of the largest completed migrations out of FNZ to date.

Quai Digital, a provider of white-label digital savings and investment platform services since 2011, completed the migration in just seven months after winning instruction from TCI, which had previously depended on FNZ, and its platform partner Embark for platform management services for the last nine years.  

The successful completion of this migration is testament to Quai Digital’s operating platform, enhanced by WealthOS technology, which together enable an all-in-one transition process — a clear break from the industry’s more standard phased approach. This showcases the partners’ ability to manage high-volume, multi-system transfers with speed, compliance and precision. 

This approach enabled Quai Digital to onboard TCI to its WealthOS-powered platform, while simultaneously migrating all existing investor accounts and executing a bulk transfer of cash and asset holdings. Investor protection and service continuity were built in from the start with reconciliation and compliance checks at every stage to ensure accuracy and integrity. Close daily collaboration between Quai Digital, WealthOS, and TCI allowed challenges such as bulk contribution uploads, inactive account handling, duplicate direct debits and other data inconsistencies to be resolved quickly and effectively. 

The entire migration was handled and completed in record time. Within seven months of contract signing in January 2025, all 126,000 investor accounts, with cash and asset transfers completed in August 2025. Once engagement with Embark (FNZ) began, the migration programme itself took only five months, including the physical migration of investor account data, and bulk transfer of cash and assets, which was completed in just four weeks.

Mark Albinson, Founder of TCI, comments: 
“We selected Quai Digital after searching for a partner that could deliver quickly and offer both modern technology and a practical, client-first service. Where others struggled to move fast or handle inflexible processes, Quai was always responsive, pragmatic and had a consistent willingness to find workable solutions, always with the protection of the end-investor in mind. The Quai API-driven platform, powered by WealthOS technology, enabled a clever, iterative product development rollout that eased significantly the pressures of migration, and now provides the scalability we need to modernise and expand our operations.”

Tony Webb, CEO at Quai Digital, adds: 
“Quai has been supporting clients through regulatory and operational change for nearly 15 years, so we know how important it is to get migrations right. By combining our operational and regulatory expertise with WealthOS’s specialist technology within our platform, we are setting a new standard for complex migrations, delivering reliability at scale and giving clients the continuity and service their investors depend on.” 

Anton Padmasiri, Co-Founder & CEO of WealthOS, comments:
“To have supported the creation of a brand new tax wrapper [the JISA] with WealthOS technology, integrated it seamlessly with a digital proposition, and successfully migrated 126,000 accounts within just seven months demonstrates exactly what can be achieved when firms adopt modern, purpose-built infrastructure. With Quai Digital, we have shown that migrations can be executed smoothly and successfully, delivering outcomes that protect investors and build confidence.” 

For TCI’s end-clients, including thousands of young people who are supported through the Share Foundation charity, this means their savings are now held on a modern, resilient system designed for long-term security and service. 

This migration on behalf of TCI marks Quai Digital’s second successfully completed migration using WealthOS technology. By year-end, Quai expects to have migrated over 130,000 accounts on behalf of three clients, managing assets worth in excess of £400 million. 

Padmasiri adds: 
“The UK’s wealth management market is over-reliant on a handful of incumbents, creating significant concentration risk. As the regulator looks to address these risks and spur competition, wealth management firms are being forced to think differently and find alternative technology and operational partners they can trust.” 

Webb concludes:
“Migrations of this scale only succeed when clients have complete confidence that their investors will be protected throughout. Our platform model, powered by WealthOS, means we can provide the operational expertise and flexible technology needed to keep TCI’s service running smoothly, giving investors the continuity, confidence and security they expect.” 

Quai Digital’s platform, powered by WealthOS, provides a rich suite of technical modules, which TCI took advantage of, to launch multiple new features, automated processing and enhanced customer journeys. These new features are underpinned by Quai Digital’s custody, regulatory and service infrastructure, ensuring resilience and continuity for TCI’s clients. 

TCI appointed DigiWealth to provide the front-end; DigiWealth used WealthOS’s APIs for fast integration. 

With TCI now live on Quai Digital’s platform, powered by WealthOS technology, the partnership provides a scalable foundation for long-term growth and the continuity of service investors depend on. 

About Quai Digital
Quai Digital is a UK wealth solutions provider helping financial firms design and operate modern savings and investment propositions. Founded in 2011, it provides investment wrappers, custody, regulatory and back-office services to support scalable, compliant solutions.

Quai oversees more than £2.5 billion of assets under administration, serving around 450,000 retail customers, including ISAs, GIAs and over 70,000 SIPPs. Its depth of regulatory and product expertise enables the reliable delivery of large, complex migrations and ensures continuity of service for clients and end-investors.

About WealthOS
WealthOS is a London-headquartered cloud-native middle-and-back office SaaS platform serving global wealth management firms, banks, platform providers, brokers and other financial institutions. Its migrations for firms to date are proving the company’s ability to handle business volumes for many of the Tier 2+ firms that make up more than 50% of the UK wealth management market. WealthOS’s distinctive modular operating system paves the way for 3x faster product development and 40% less cost. It makes light work of the most complex migrations and empowers UK wealth management firms to scale and expand their operations using market-leading technology. Founded in 2019 and with operations in the UK and Sri Lanka, WealthOS is backed by Barclays and Capricorn Capital Partners UK.

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