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The rise of digital disruptors, challenger banks, and sustainability-focused financial institutions has reshaped the banking landscape, drawing billions in investment. To compete with established players, these newcomers have had to balance rapid customer acquisition with long-term retention. While digital banks once displayed wide swings in retention rates - some enjoying strong loyalty while others faced steep churn - recent trends suggest that retention has begun to stabilize. In the first quarter of 2025, for example, Monzo reported a positive retention ratio, while Starling Bank experienced a modest decline.

Biggest winners

In the first quarter of 2025, Nationwide and Monzo emerged as the leaders in customer retention, achieving an impressive ratio of *** and**** new customers for every one lost, respectively. Danske Bank, HSBC, The Co-operative Bank, and Triodos Bank also achieved good results, with *** customers switching to their services for every departing customer. In stark contrast, AIB Group faced significant challenges, with a concerning ratio of **** customers leaving for each new customer acquired.

Customer growth of digital banks

Digital-only banks have achieved remarkable growth in the European financial sector, with London-based Revolut leading the charge. In November 2024, Revolut reported a significant milestone of over ** million global customers, building on its strong momentum from 2024 when monthly app downloads surpassed *** million.