Brex's Vertical Integration Advantage
Founder of startup card issuing platform on the competitive dynamics of card issuing
Brex’s edge came from owning more of the card and money movement stack than most fintech peers, which let it turn a corporate card into a bundled operating system for finance teams. Instead of just sitting on top of an issuer processor and sponsor bank, Brex built direct card network connectivity, banking rails, and spend software, so it could ship tighter workflows like card issuance, approvals, reconciliation, ACH, treasury, and bill pay as one product.
-
That vertical integration mattered most in corporate spend, not in BaaS. A startup wanting to launch its own branded card program would still go to infrastructure vendors like Lithic, Marqeta, or Unit. Brex used its stack to win end customers, not to become the neutral platform under everyone else’s program.
-
The practical benefit was speed and control. Brex could connect directly to Mastercard, issue local cards across many countries, and pair those cards with built in spend controls and reconciliation. Competitors using middleware had another dependency between the app and the network, which slowed new geography launches and limited global enterprise use cases.
-
Software changed the economics. Corporate cards alone monetize mostly through interchange, but adding expense management and subscriptions made the customer relationship stickier and raised revenue per account. That pattern later spread across fintech, with Brex and Ramp both moving beyond pure transaction fees into paid software and broader finance workflows.
The market has kept moving in this direction. The winners in corporate finance are the ones that either own enough infrastructure to deliver a clearly better card and banking product, or own enough workflow software to make payments disappear into the job the customer is already doing. Brex pointed early to that convergence, and the category has followed.