The Children’s ISA (TCI), the UK’s specialist provider of children’s ISA products, has successfully moved all 126,000 of its ISA and Junior ISA accounts from Embark, part of FNZ, to Quai Digital’s platform, which is powered by WealthOS technology.
The migration, believed to be one of the largest of its kind from FNZ, was completed within just seven months.
Quai Digital, which has been providing white-label digital savings and investment services since 2011, undertook the transfer after being appointed by TCI, which had relied on Embark and FNZ for nine years. The swift and comprehensive migration has been described as a significant milestone in reducing the UK wealth market’s dependence on major incumbents.
The transition was achieved through Quai Digital’s operating platform, underpinned by WealthOS, which enabled the full transfer in a single, streamlined process. This represented a departure from the sector’s usual phased approach, offering faster, compliant, and precise results.
The migration covered cash and asset holdings alongside investor accounts, with reconciliation and compliance checks built into every stage. Daily collaboration between Quai Digital, WealthOS, and TCI helped resolve operational challenges such as bulk contribution uploads and data inconsistencies with speed and accuracy.
The programme began in January 2025, with data migration and asset transfers completed by August. Remarkably, the physical movement of investor account data, as well as cash and assets, took just four weeks. This efficiency underscored the capabilities of the Quai- and WealthOS-powered model to deliver continuity for investors while reducing the risks often associated with large migrations.
TCI founder Mark Albinson said, “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.”
WealthOS co-founder and CEO Anton Padmasiri said, “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’ve shown that migrations can be executed smoothly and successfully, delivering outcomes that protect investors and build confidence.”
The migration ensures TCI’s customers, including thousands supported through the Share Foundation charity, now benefit from a resilient, modernised platform designed for long-term security and growth. It also marks Quai Digital’s second migration completed using WealthOS technology, with over 130,000 accounts and more than £400m in assets expected to be transferred across three clients by the end of the year.
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