Stripe, Plaid, and the Infrastructure Behind Modern Payments
Two companies have become foundational to how money moves online. Here's how their systems work, what makes them different, and where the payments infrastructure industry is heading.
When a consumer pays for something online or connects their bank account to a financial app, the transaction feels instantaneous. Behind that experience, however, lies a complex infrastructure of APIs, banking networks, compliance systems, and settlement processes that most users never see. Two companies — Stripe and Plaid — have become essential components of this infrastructure, each solving different but complementary problems in the way money moves through the digital economy.
What Stripe Does
Stripe is a payments infrastructure company. At its core, it provides the technology that allows businesses to accept payments over the internet. When an e-commerce site processes a credit card transaction, when a SaaS company charges a monthly subscription, or when a marketplace splits payments between multiple sellers, there is a good chance that Stripe's APIs are handling the underlying payment flow.
The company's primary product is its payments API, which abstracts away the complexity of interacting with card networks (Visa, Mastercard, American Express), issuing banks, acquiring banks, and payment processors. A developer can integrate Stripe with a few lines of code and immediately begin accepting payments from customers in over 40 countries, in more than 135 currencies. Stripe handles authorization, capture, settlement, refunds, disputes, and compliance — the full lifecycle of a payment.
Beyond basic payment processing, Stripe has expanded into a broad platform of financial infrastructure services. Stripe Connect enables marketplaces and platforms to manage complex multi-party payment flows. Stripe Billing handles subscription management and recurring revenue. Stripe Atlas helps entrepreneurs incorporate businesses. Stripe Treasury provides banking-as-a-service capabilities that allow platforms to offer their own users deposit accounts and debit cards. And Stripe Issuing lets businesses create and manage their own payment cards.
Stripe's revenue model is transaction-based: the company takes a small percentage of each payment processed through its platform, typically around 2.9% plus 30 cents for a standard U.S. card transaction, with different rates for international transactions, ACH payments, and high-volume customers. The company was valued at approximately $65 billion in its 2023 funding round and has since been reported to be processing over $1 trillion in annual payment volume.
What Plaid Does
Plaid solves a different problem. Rather than processing payments, Plaid connects financial applications to users' bank accounts. When a consumer signs up for a budgeting app like Mint (now Credit Karma), links their bank account to Venmo, or verifies their identity for a new financial service, Plaid is often the company that facilitates that connection.
Plaid operates as a data network that sits between financial institutions and fintech applications. Its APIs allow apps to access account balance information, transaction history, identity data, and account ownership verification — with the consumer's permission. The company connects to thousands of financial institutions across the United States and several other countries, providing a standardized interface that developers can use regardless of which bank their users belong to.
The company has also expanded beyond basic data connectivity. Plaid's Transfer product enables ACH-based money movement — essentially allowing apps to initiate bank transfers — which puts it in partial competition with Stripe in some use cases. Plaid Identity Verification provides document verification and anti-fraud services. And Plaid's open banking partnerships with banks like Truist, as discussed elsewhere in our coverage, are building the API-based data-sharing infrastructure that will underpin the next generation of consumer financial services.
How They Work Together
Stripe and Plaid are not competitors in the traditional sense. They operate at different layers of the financial infrastructure stack, and many applications use both services simultaneously. An app might use Plaid to verify a user's bank account and pull in their transaction history, and then use Stripe to process card payments or manage subscriptions. The combination allows developers to build comprehensive financial experiences without interacting directly with banks or payment networks.
This complementary relationship reflects a broader trend in fintech infrastructure: specialization. Rather than one company trying to provide every financial service, the industry has evolved toward a modular architecture where specialized providers handle specific functions — payments, data connectivity, identity verification, lending, compliance — and developers assemble these components to build their applications.
The Competitive Landscape
Neither Stripe nor Plaid operates without competition. In payments, Adyen has built a strong position serving large enterprise merchants, with a particular strength in omnichannel (online plus in-store) payments. Square (now Block) has expanded from small-business point-of-sale into a broader financial services platform. PayPal remains one of the largest payment processors in the world, though it operates more as a consumer-facing brand than as infrastructure.
In data connectivity, Mastercard's acquisition of Finicity (now part of its open finance platform) gave it a significant presence in the bank data aggregation market. Yodlee, owned by Envestnet, has been connecting financial applications to bank data since before Plaid existed. MX Technologies and Akoya are also active in the space, with Akoya taking a bank-consortium approach that some institutions prefer.
The trend toward consolidation and convergence in this market is notable. As Stripe moves into banking services and Plaid moves into payments, the boundaries between these companies — and between fintech infrastructure providers and traditional financial institutions — continue to blur.
What Comes Next
Several developments will shape the future of payment infrastructure in the United States. Real-time payments through the FedNow service, launched by the Federal Reserve in 2023, are still in the early stages of adoption but promise to fundamentally change how money moves between banks — potentially reducing the settlement delays that have long characterized the U.S. banking system.
Open banking regulation under the CFPB's Section 1033 rule will standardize how banks share data with third parties, which could reduce the role of intermediaries like Plaid in some scenarios while simultaneously expanding the market for open banking services overall. And the continued growth of embedded finance — where non-financial companies offer financial products within their own platforms — will drive demand for the kind of infrastructure that both Stripe and Plaid provide.
For developers, merchants, and consumers, the practical impact of all this infrastructure work is a financial system that is becoming more connected, more programmable, and more responsive to real-time needs. The companies that build and maintain this infrastructure may never be household names, but they are increasingly essential to how the modern economy functions.
