Mercury, Brex, and Ramp keep landing on the same shortlists for startups and small businesses, and for good reason. All three offer corporate cards without a personal guarantee, software to manage spend, and no annual card fee. But they are built around different priorities, and choosing wrong can cost you in rewards or workflow.
This comparison breaks down rewards, fees, eligibility, and what each platform is really for. All figures are current as of June 2026. This is general information, not financial advice, and program terms can change.
What Each Platform Is At Its Core
The three are not clones. Brex built its name on high-limit corporate cards aimed at venture-backed startups. Mercury is fundamentally a business banking platform that added a card on top. Ramp is a spend-management system that bundles cards, expenses, bill pay, and accounting automation.
That core identity shapes everything else. Brex leans into card limits and rewards multipliers. Mercury leans into banking plus a simple cashback card. Ramp leans into controls and automation that cut busywork.
Knowing which problem you are solving makes the choice much clearer than chasing a single rewards number.
Rewards and Cashback
Rewards are where the three diverge most. Brex offers tiered points: as of June 2026, reports cite roughly 7x on rideshare, 3x on restaurants, 2x on software, and 1x on everything else, which suits teams that spend heavily in those categories.
Ramp keeps it simple with a flat cashback rate around 1.5% that goes straight back to your company, with no points system to manage. Mercury's IO card program also offers about 1.5% cashback. Both flat-rate options favor businesses that value predictability over category optimization. On the personal side, our roundup of cash back credit cards covers options for founders still rebuilding personal credit.
The honest takeaway: Brex can win on rewards if your spending matches its bonus categories, while Ramp and Mercury offer cleaner, flat returns. If you would spend hours optimizing categories you do not actually use, the flat 1.5% is often the better real-world deal.
Fees, Eligibility, and Spend Controls
All three charge no annual fee on the basic card, but their paid tiers and requirements differ.
Brex offers a free Essentials plan, with Premium around $12 per user per month; a per-trip travel fee can apply. Mercury's core banking is free with no monthly fees or minimums, and Mercury Plus runs about $35 per month (or roughly $29.90 billed annually). Ramp's free tier includes cards, basic expense management, and bill pay, with a Plus tier around $15 per user per month adding advanced approval workflows and accounting automation.
Eligibility is the part founders underestimate. As of June 2026, reports indicate Brex generally targets venture-backed or well-funded companies (often around $50K in the bank or VC backing). Ramp has commonly looked for a minimum business-account balance near $25,000. Mercury card eligibility piggybacks on its banking approval, which many non-resident founders find more accessible. Always confirm current requirements directly, since they shift.
Side by Side Comparison
Here is the three-way view, as of June 2026.
| Feature | Mercury | Brex | Ramp |
|---|---|---|---|
| Core identity | Business banking + card | High-limit corporate cards | Spend management suite |
| Rewards | ~1.5% cashback (IO card) | Tiered points (up to 7x categories) | ~1.5% flat cashback |
| Annual card fee | $0 | $0 | $0 |
| Paid tier | Mercury Plus ~$35/mo | Premium ~$12/user/mo | Plus ~$15/user/mo |
| Typical eligibility | Tied to Mercury banking approval | Often VC-backed or ~$50K+ | Often ~$25K+ balance |
| Best for | Banking-first teams | Category-heavy startups | Automation and controls |
None of the three is strictly best. The right pick depends on whether you prioritize banking, rewards categories, or spend automation.
Which One Should You Choose
Choose Brex if your spend concentrates in its bonus categories like rideshare and software, and you want high limits with strong rewards. It rewards startups that lean into those categories and meet its funding-oriented eligibility.
Choose Mercury if you want banking and a card under one roof and value a simple flat cashback. It is often the most accessible for founders, including some non-resident businesses, since card access flows from banking approval.
Choose Ramp if cutting expense busywork is the priority. Its automation, approval workflows, and accounting integrations are the draw, with flat cashback as a bonus rather than the headline. Many growing teams pick Ramp specifically to reduce manual finance work.
The Bottom Line
Mercury, Brex, and Ramp solve overlapping problems from different angles. Brex optimizes rewards for category-heavy spenders, Mercury bundles banking with a straightforward card, and Ramp automates spend management end to end.
Decide what you actually need most, then confirm current rewards, fees, and eligibility directly with each provider before applying. The best corporate card is the one that fits how your business spends and operates, not the one with the flashiest single number.
Frequently Asked Questions
Do Mercury, Brex, and Ramp require a personal guarantee?
Generally no. All three market corporate cards that do not require a personal guarantee, relying instead on your business's finances and underwriting. This is a key reason founders prefer them over traditional small-business credit cards.
Which has the best rewards, Mercury, Brex, or Ramp?
It depends on your spending. Brex offers tiered points that can reach high multipliers in categories like rideshare and software, while Ramp and Mercury offer flat cashback around 1.5%. If your spend matches Brex's categories, it can win; otherwise the flat options are often better in practice.
Which is easiest to qualify for?
Mercury is frequently the most accessible because card eligibility ties to its banking approval, which many founders, including some non-residents, find easier to obtain. Brex often targets venture-backed companies, and Ramp has commonly looked for a minimum business-account balance. Confirm current requirements directly.
Are these corporate cards free to use?
The basic cards from all three carry no annual fee. Each offers optional paid tiers, such as Mercury Plus, Brex Premium, and Ramp Plus, that add features for a monthly cost. You can often run the core card and software for free.
This is general information, not financial advice. Terms, rewards, and eligibility vary by provider and may change.
