Mercury vs Brex — startup banking (2026)
Banking & payments
Mercury Bank
Up to $50k
Free banking with no minimums. Their Perks bundle layers AWS, Carta, GCP, Notion, and more at preferential rates once you're a customer.
See Mercury Bank →
Banking & payments
Brex
Up to $175k
Corporate cards, business banking, and a partner-perks bundle worth $175k+ across AWS, GitHub, Notion, Slack, and 25 other tools.
See Brex →How to choose
Founder-friendly business banking went from "use a regional bank that doesn't understand startups" to "two well-funded options that get it" in about three years. Mercury and Brex are the defaults. They both bundle perk marketplaces — Mercury's is smaller but curated; Brex's is broader and more aggressive on discounts.
The choice is mostly about how you think about money flow. Mercury is a bank first, perks second — interest-bearing checking, treasury, and a clean UI for moving money. Brex is a card platform first, banking second — its perk bundle is the headliner and its corporate card limits favor funded startups.
Side-by-side
| Feature | Mercury Bank | Brex |
|---|---|---|
| Account minimum | $0 | $0 |
| Treasury / interest on cash | Yes (Mercury Treasury) | Yes (Brex Cash) |
| Partner-perks bundle value | ~$50k+ | $175k+ |
| Corporate card | Mercury IO Card (charge card) | Brex Card (charge card, higher limits for funded startups) |
| International wires | Yes | Yes |
| Best for | Day-to-day banking + treasury | Card spend + the broadest perk marketplace |
| Open in | Minutes (Stripe Atlas or Firstbase friendly) | Minutes (US-incorporated startups) |
Pick Mercury Bank if…
Founders who want a single clean banking UI, treasury yield on idle cash, and don't depend on credit-card limits.
Pick Brex if…
Funded startups (Brex Cash + the card stack benefit from a deposit history), founders who run paid ad spend or travel through corporate cards, or anyone who specifically wants the larger partner-perks marketplace.
Bottom line
Open both. They're both free, they integrate with each other, and you'll naturally settle on which one you actually use within a month. Most founders end up with Mercury for operating cash and Brex for the card spend / partner deals.
More founder-perk comparisons
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