Why Fintech Is Becoming the Backbone of Modern Financial Services

Financial institutions processed an estimated $1.8 quadrillion in global transactions in 2024, and fintech infrastructure handled a growing share of that volume. Stripe alone processed $1 trillion. Adyen handled $970 billion. Visa and Mastercard, which increasingly operate as technology companies, processed a combined $14.8 trillion. Fintech is no longer an alternative to the financial system — it is the operating layer that makes the financial system function.

S&P Global analysis found that 92% of financial institutions now use at least one fintech-provided service in their operations. Among the top 50 global banks, the average number of fintech vendor relationships exceeded 40 in 2024, up from 12 in 2018. These relationships span every operational area: payment processing, fraud detection, identity verification, regulatory reporting, customer onboarding, and data analytics.

A typical online purchase in 2025 touches multiple layers of fintech infrastructure. A payment gateway (Stripe, Adyen, or Checkout.com) initiates the transaction. A fraud detection engine (Featurespace, Sardine, or Visa's AI systems) screens for unauthorized activity in milliseconds. A card network routes the authorization. A card issuer processes it. A settlement system clears the funds.

Each layer involves specialized fintech companies: Marqeta and Galileo provide card issuance infrastructure, Modern Treasury and Plaid handle bank-to-bank money movement, Alloy and Socure verify customer identity, and ComplyAdvantage screens for money laundering. CB Insights estimated that the average financial transaction in a developed market passes through 5-7 distinct technology providers before completion.

Banks depend on fintech infrastructure for a simple reason: building equivalent capabilities in-house takes longer and costs more. A bank that wants to launch a digital lending product can either build a custom underwriting engine over 12-24 months at a cost of $10-30 million, or integrate with a fintech lending infrastructure provider like Blend, Upstart, or Amount in 3-6 months at per-transaction fees that align with revenue generation.

BCG estimated that banks using fintech infrastructure for lending reduce their cost-to-originate by 40-60%. Loan processing times drop from 5-7 days to under 24 hours. Customer satisfaction scores improve by 15-25 points. These performance improvements create a growing competitive gap between banks that adopt fintech infrastructure and those that maintain legacy approaches.

Fintech's role as infrastructure extends well beyond traditional banking. E-commerce platforms depend on fintech for payment processing. Gig economy companies depend on fintech for instant worker payments. Healthcare companies use fintech for patient billing. Real estate platforms use fintech for mortgage origination and title verification.

Shopify's financial services revenue — including payment processing, capital advances, and business banking — accounted for over 70% of its gross profit in 2024. Amazon's payment processing and merchant lending operations generate billions in annual revenue. Statista projected that the number of companies using embedded financial services will exceed 500,000 globally by 2028, up from approximately 150,000 in 2024. Each of these companies depends entirely on the fintech infrastructure backbone.

As fintech becomes the backbone of financial services, it attracts regulatory scrutiny proportional to its systemic importance. The Bank for International Settlements published a 2024 report on concentration risks in fintech infrastructure, noting that a small number of cloud providers and API platforms handle a disproportionate share of financial transactions.

The EU's Digital Operational Resilience Act (DORA), effective January 2025, requires financial institutions to manage and test the resilience of their technology supply chains, including fintech vendors. The UK's FCA has proposed similar oversight for critical third-party providers. In the US, the OCC is evaluating whether certain fintech infrastructure providers should be subject to direct supervisory examination. The companies that provide the backbone will face increasing expectations around resilience, security, and transparency.