Why Fintech Is Becoming the Backbone of Modern Financial Services

Share Share Share Share Email Financial institutions processed an estimated $1.8 quadrillion in global transactions in 2024, and fintech infrastructure handled a growing share of that volume, according to McKinsey’s Global Payments Report. Stripe alone processed $1 trillion. Adyen handled $970 billion.

Visa and Mastercard, which increasingly operate as technology companies rather than traditional card networks, 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. From Alternative to Operating System The shift happened gradually and then all at once.

In 2015, most fintech companies operated at the margins of the financial system, offering alternatives to specific banking products. By 2020, fintech companies had become service providers to the banks themselves. By 2025, fintech infrastructure is embedded so deeply into financial services operations that removing it would disrupt the basic functioning of payments, lending, and compliance across the industry.

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.

the rise of fintech infrastructure platforms represents a $150 billion opportunity as the sector shifts from standalone products to infrastructure that other businesses build upon. The most valuable fintech companies in 2025 are not consumer apps but infrastructure providers whose services are invisible to end users yet essential to every financial transaction they make.

The Infrastructure Stack Behind Every Financial Transaction A typical online purchase in 2025 touches multiple layers of fintech infrastructure. The 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 (Visa, Mastercard, or a local scheme) routes the authorization request. A card issuer processes the authorization. A settlement system clears the funds, typically within 24 hours for domestic transactions. 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. ComplyAdvantage and Chainalysis screen for money laundering. CB Insights estimated that the average financial transaction in a developed market passes through 5-7 distinct technology providers before completion.

financial APIs are powering the next generation of fintech platforms that connect these layers through standardized interfaces. Without APIs, each integration between a bank, a payment processor, a fraud detector, and a compliance tool would require custom development. APIs make the financial technology stack modular and interoperable, allowing companies to assemble custom solutions from best-in-class components.

Why Banks Depend on Fintech Infrastructure 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 has two options. Option one: build a custom underwriting engine, integrate with credit bureaus, develop a loan servicing platform, and create a customer-facing application.