Open Banking and Financial Data: Unlocking New Opportunities for the Underserved

For most of the history of consumer banking, financial data has been trapped. A consumer's transaction history, account balances, credit utilization, and payment behavior lived inside the systems of whichever institutions happened to hold their accounts — inaccessible to the consumer themselves in any useful form and inaccessible to third-party providers who might be able to use that data to deliver better products and services. This data asymmetry benefited established banks, which could use customer data to cross-sell products and assess risk, while preventing new entrants from using the same data to compete.

Open banking is changing this. Regulatory frameworks in the United Kingdom, the European Union, Brazil, Australia, and a growing list of countries now require banks to provide standardized API access to customer financial data — with the customer's consent — to authorized third parties. The result is an emerging ecosystem of financial data products that can use a consumer's actual financial history, across all of their accounts and institutions, to deliver more accurate credit assessments, more personalized financial advice, better comparison tools, and more relevant product recommendations than was possible when data was siloed within single institutions.

For financial inclusion, the potential of open banking is enormous — but capturing it requires design choices that explicitly center the needs of underserved populations rather than defaulting to the easier, more profitable mainstream use cases.

How Open Banking Works

The mechanics of open banking vary by jurisdiction, but the core concept is consistent. When a consumer authorizes an application — a financial management app, a lender, a comparison service — to access their financial data, the application uses a standardized API to retrieve that data from the consumer's banks and financial institutions. The data might include transaction history, account balances, recurring payment patterns, or categorized spending analysis, depending on the scope of authorization.

The data flows are governed by consent frameworks — legal and technical structures that require the consumer to explicitly authorize each data sharing arrangement, specify what data is shared and for how long, and provide a clear mechanism for revoking access. In well-designed open banking regimes, the consumer has genuine control over their financial data and can use that control to unlock competitive offers from new providers.

The technical infrastructure of open banking — APIs, authentication protocols, data standards — is mostly built and stable in the leading markets. The remaining challenges are primarily about consumer awareness, trust in the consent framework, and the design of products that make the value of data sharing immediately legible to consumers who may be skeptical about why a third party wants access to their bank account data.

The Inclusion Use Cases That Matter Most

Credit for the Thin-File Borrower

The most powerful inclusion application of open banking is credit underwriting for consumers with thin or no credit bureau files. When a lender can access a borrower's complete transaction history — their income deposits, bill payment patterns, savings behavior, and spending stability — through open banking APIs, they gain underwriting data that is far more relevant than the bureau score, which may be entirely absent for the borrower in question.

A borrower who has received regular payroll deposits for three years, paid their utilities reliably, and maintained a consistent savings habit is demonstrating creditworthiness that a bureau-dependent underwriting model will miss. Open banking data makes this creditworthiness visible, enabling lenders to serve a population that is currently excluded not because they are bad credit risks but because the data to evaluate them has been inaccessible.

Account Switching and Competition

One structural cause of financial exclusion in many markets is the lack of competitive pressure on institutions serving lower-income customers. When switching banks requires time, paperwork, and the loss of account history, customers stay with their current institution even when better alternatives exist. Open banking-enabled account portability — the ability to carry your complete transaction history with you when you switch providers — reduces the friction of switching and increases competitive pressure on incumbent institutions to improve their products and reduce their fees for all customer segments.

Financial Health and Cash Flow Management

Financial management tools built on open banking data can provide underserved consumers with visibility into their complete financial picture that was previously available only to more affluent individuals who engaged premium financial advisors. Seeing all accounts and transactions in one place, receiving alerts when recurring bills are about to create a cash flow shortfall, and getting personalized recommendations for reducing fees or switching to better products — these tools are valuable to every consumer but most valuable to those with the least financial cushion, for whom unexpected expenses or missed payments create the most serious harm.

Benefits Screening and Enrollment

Open banking data can streamline eligibility verification for government benefit programs, reducing the administrative burden on applicants and the processing cost for program administrators. For low-income individuals who currently navigate complex, paper-intensive application processes for SNAP, housing assistance, childcare subsidies, and other benefits, open banking-enabled income and asset verification could significantly reduce the friction of accessing programs to which they are entitled.

Risks and Design Principles

Open banking is not a guaranteed inclusion benefit. Poorly designed open banking products can introduce new harms alongside new opportunities. The most important design risks to avoid:

• Predatory use of consent: The consent frameworks that govern open banking data sharing must genuinely protect consumer interests. Products that bury the scope of data sharing in complex terms of service, or that use data authorizations for purposes beyond what the consumer understood when they consented, are exploiting the infrastructure of open banking against the interests it was designed to serve.
• Digital-only access: Open banking products that require smartphone access and reasonable digital literacy to use effectively will exclude the most digitally marginalized populations. Products designed for inclusion must be accessible through low-bandwidth connections, simple interfaces, and — where necessary — offline or agent-mediated enrollment flows.
• Data security vulnerabilities: The expansion of API-based data sharing increases the attack surface for data breaches and identity fraud. Open banking products serving lower-income consumers must invest in security infrastructure appropriate to the sensitivity of the data they access, and must implement robust fraud detection that does not impose excessive friction on legitimate users.

Blok AI Capital is actively exploring investment opportunities in the open banking infrastructure and application layer, particularly in emerging markets where regulatory frameworks are still being designed and first-mover advantages are most significant. We are also interested in companies building open banking-enabled inclusion applications — credit, financial health tools, and benefit navigation — that center the needs of underserved populations in their design. If you are building in this space, connect with our team.