TLDR:
Open banking is a financial services model where banks share customer data with third-party providers via secure APIs, enabling customers to access a broader range of financial products and services.
How Open Banking Works
Open banking requires banks to expose APIs that let authorized third parties access customer account data, initiate payments, and provide value-added services — all with explicit customer consent. The customer remains in control: they can grant access to specific data for specific purposes and revoke access at any time. Authentication typically uses OAuth 2.0 with strong customer authentication (SCA) under PSD2 in Europe.
Regulatory Frameworks
Major open banking regimes include the EU’s PSD2 and PSD3, the UK Open Banking Standard, Australia’s Consumer Data Right (CDR), and Singapore’s open banking initiatives. The US has taken a more market-driven approach, with the CFPB issuing personal financial data sharing rules under Section 1033 of the Dodd-Frank Act. Each framework defines who must provide access, what data must be shared, and security requirements.
Opportunities for Startups
Open banking enables fintech startups to build innovative products without becoming banks themselves. Use cases include account aggregation (Plaid, Yodlee), automated savings, lending decisions based on real bank data, simplified payments, personal financial management, and business accounting integrations. The competitive landscape rewards startups that move quickly while maintaining strict security and compliance.