Fintech Spotlight Series: Flagstone International

Flagstone International is a fintech redefining global cash management.

28 Oct 2026

Optimising Cash Management

Access multi-currency deposits, competitive interest rates, and spot FX services — all in one platform. Achieve greater returns, diversify risk, and reduce administrative complexity.

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Headquartered in Jersey, Flagstone International’s mission is simple; to help clients make their cash work harder while making cash management simpler.

Flagstone International’s platform provides easy access to more than 500 cash products through one account and one simple interface. By removing the need for multiple onboarding journeys and time-consuming administrative processes, clients can easily search, select, place and manage cash products at the click of a button.

We noted the ease of the platform having cash deposits and FX all in a one stop shop. This allows us to forecast USD invoicing by quickly converting GBP or EUR to USD and then hold the USD on deposit, earning interest, until the invoice is due.
Corporate Client, Channel Islands

At the heart of Flagstone International’s proposition is operational simplicity. Rather than navigating multiple providers, reporting frameworks and account structures, Flagstone International’s clients benefit from a streamlined experience supported by consolidated reporting and real-time visibility across transactions and holdings at account or portfolio level. The result is greater efficiency, enhanced control, lower costs and better yields through one transparent marketplace.

Since launching in 2022, Flagstone International has helped corporates, family offices and high-net-worth clients streamline the way they manage cash, handling billions in cash for clients in over 60 countries.

“Everyone is trying to preserve the value of their cash in a high inflation environment. For most, this becomes a trade-off: balancing the need for yield with the headaches and time-cost of finding the best products, trusted counterparties, and administrative overheads of account opening and maintenance across multiple banks. We have solved for this, and we are very proud to say that demand for the solution is huge.” Aidan McAvinue, CEO of Flagstone International

Jersey is our HQ for a reason: our partners and clients apply significant value to the island’s reputation for control, scrutiny and integrity.
Aidan McAvinue, CEO of Flagstone International

Recent News

As cash management needs continue to evolve, so does Flagstone International’s offering. Eligible entity clients can now access institutional Money Market Funds on an execution-only basis. This access is alongside deposits and FX solutions all through a single account opening process and all on Flagstone International’s platform.

Powered by State Street’s Fund Connect platform, this new offering provides access to a range of Money Market Funds from leading global asset managers, helping clients enhance diversification, strengthen liquidity management all through one platform.

Learn more here about Money Market Funds and how Flagstone International can support your liquidity strategy today.