MARQETA

Jason Gardner spent years working in payments at Visa and a string of financial services companies. He watched talented developers try to build new financial products and get completely blocked — not by lack of ideas, but by the sheer brutality of working with legacy bank infrastructure.

Old card issuing systems were built in the 1970s. They were inflexible, slow to integrate, and required months of negotiation just to issue a basic card.

Gardner founded Marqeta in 2010 with a simple, frustrating observation: what if issuing a payment card was as easy as calling an API?

The first few years were genuinely rough. Marqeta was trying to sell infrastructure to an industry that didn't know it needed new infrastructure.

Banks were skeptical. Early investors were hard to find.

Gardner bootstrapped longer than most founders would have stomached, keeping the team small and focused on the core technical problem — building a modern, programmable card issuing platform from scratch.

The real turning point came when on-demand economy companies started exploding. Uber, Instacart, DoorDash — these businesses needed to issue cards to contractors instantly, put specific spending rules on them, and control transactions in real-time.

The legacy systems couldn't do any of that. Marqeta could.

Suddenly, being the unsexy infrastructure company was exactly the right place to be.

Marqeta is a card issuing platform. Companies come to Marqeta when they want to issue debit or prepaid cards — either to their customers, their employees, or their contractors — without building that capability themselves from scratch.

The way they make money is relatively straightforward: Marqeta takes a cut of the interchange fee every time a card they've issued is used to make a payment. Interchange is the small percentage that flows to the card issuer whenever someone swipes.

Most of the time that's a bank — but when the card was issued via Marqeta, Marqeta captures a portion of that fee. Volume is everything.

The more transactions their clients process, the more Marqeta earns.

What makes the business model interesting is the 'Just-in-Time Funding' feature — Marqeta can fund a card at the exact moment of a transaction, not before. That means a gig economy platform can load money onto a driver's card the instant a delivery is completed, rather than pre-loading funds that sit idle.

For companies managing thousands of contractors, that's a meaningful cash flow advantage.

The flip side of the model is concentration risk. For years, Square (now Block) was responsible for over 60% of Marqeta's revenue.

That's a terrifying dependency for a public company — and it showed up immediately in the share price volatility every time Block renegotiated its contract.

The core product is the Marqeta card issuing platform — an API that lets businesses issue physical or virtual Mastercard cards, set real-time spending controls, and manage transactions programmatically. What used to take months of bank integration work can be done in days via the Marqeta dashboard and API.

Just-in-Time Funding is the standout feature for gig economy clients. It lets companies fund a card at the exact moment of a transaction rather than maintaining pre-loaded balances.

A delivery driver's card is funded the instant the delivery is confirmed — not before. That means the platform company isn't sitting on idle cash for thousands of contractors.

Marqeta also offers tokenization and digital wallet support, letting issued cards work immediately with Apple Pay and Google Pay before the physical card even arrives. For consumer fintech companies, that's the difference between a customer being active on day one or waiting a week for a card in the mail.

On the data side, Marqeta provides real-time transaction data and controls that legacy issuing systems simply can't match. A company can set rules like 'this card only works at grocery stores between 8am and 9pm' and enforce them at the transaction level.

For expense management companies and corporate card platforms, that granular control is the entire product.

Marqeta's growth strategy wasn't viral loops or growth hacking. It was picking the right wave and being technically ready to ride it.

The on-demand economy needed something that didn't exist yet: instant, programmable card issuance with real-time spending controls. Uber needed a way to pay drivers immediately after a trip.

DoorDash needed cards that only worked at specific restaurants. Instacart needed cards that could be topped up mid-shop if a customer added items.

None of this was possible with existing systems. Marqeta had built exactly the platform that made all of it possible.

They also made a smart strategic bet on embedded finance before that phrase was trendy. Instead of going direct to consumers, they went direct to developers.

The Marqeta API was designed to be the easiest card issuing integration on the market. That meant any startup building a financial product — expense management, earned wage access, BNPL, crypto debit cards — would reach for Marqeta first because it was simply the fastest way to get to market.

The Cash App partnership with Block was the defining growth moment. When Block chose Marqeta to power the Cash Card, it wasn't just revenue — it was a signal to the entire fintech ecosystem that Marqeta was the serious choice.

More logos followed.

The Block problem is the honest answer here. At IPO in 2021, Block accounted for roughly 70% of Marqeta's net revenue.

That is an almost comically dangerous level of concentration for a public company. When Block renegotiated its contract in 2022, Marqeta had to give up margin to keep the relationship — and the stock dropped hard.

The message to the market was clear: Marqeta's growth story depended heavily on one customer's growth story.

Diversification has been the stated priority since the IPO, and they've made progress — adding names like Goldman Sachs, Affirm, Klarna, and JP Morgan. But building real revenue diversity takes time, and in the meantime every Block earnings call is also de facto a Marqeta risk event.

Beyond concentration, the competitive threat from the major card networks themselves is real. Visa and Mastercard have both launched their own card issuing APIs in recent years.

They have existing relationships with every bank on the planet and enormous sales teams. Marqeta's advantage is speed and flexibility — but the incumbents are slowly closing the gap.

Being the cool, developer-friendly alternative only works until the incumbents become developer-friendly too.

Marqeta's investor list reads like a who's who of fintech believers. Early backing came from Visa, which invested in 2017 — a somewhat unusual move for an incumbent network to invest in infrastructure that theoretically competes with it, but Visa was clearly thinking about the API economy before most people were using that phrase.

Mastercard also became an investor, which tells you something about how the card networks think about Marqeta: less as a threat and more as a distribution channel for their own rails. If Marqeta is issuing cards, they're issuing Mastercard and Visa cards — the networks get their cut either way.

Other notable backers included Goldman Sachs, Coatue Management, and ICONIQ Capital. The Goldman relationship eventually went beyond investment — Goldman became a Marqeta client, using the platform to issue cards for its Marcus and Apple Card programs.

That's the ideal investor relationship: they put money in and then become a revenue source too.

Marqeta went public in June 2021 at $27 per share, valuing the company at around $16 billion. The IPO was oversubscribed and the first-day pop was substantial.

Then came the concentration risk reality check, the Block renegotiation, and the broader fintech selloff of 2022. The stock fell more than 80% from its peak.

It has been a lesson in why infrastructure businesses with single-customer dependency are harder to value than they look on the way up.