Free Cards Fueled Brex's Growth

Free cards were Brex’s wedge to turn a sleepy corporate card market into a software land grab. Traditional corporate cards made money up front with annual fees and tight underwriting, while Brex removed the fee, approved startups from cash balances instead of founder guarantees, and got paid every time the card was swiped through interchange. That made the card feel easy to adopt, and it let Brex use payments volume as the entry point into expense management, bill pay, and the broader finance stack.1 2 3 4

• The real product was not just free plastic. A startup could connect its bank account, get approved in seconds, and receive limits far above a typical Amex program because underwriting was based on cash on hand. That solved a concrete problem for venture backed companies with money in the bank but thin credit files.1 2
• This pricing model flipped how customer acquisition worked. Instead of asking a founder or finance lead to budget $300 to $600 per card each year, Brex could hand out cards broadly, earn roughly 2.7% on purchase volume, and subsidize perks. In practice, the startup was paid to switch, rather than paying to adopt.1
• The weakness of free card economics is that cards alone are easy to replace. In expense software, the sticky part is the workflow around requesting, approving, paying, and reconciling spend. That is why the category shifted from card rewards toward software controls, and why Brex and peers expanded into spend management subscriptions and deeper finance tooling.1 3 4

The market keeps moving toward bundled finance software where payments fund distribution, but software drives retention. The winners will keep using cards as the top of funnel, then lock in customers through approvals, accounting integrations, and multi product adoption across the finance team.3 4 5