Which corporate cards are most widely used by US startups?

Ramp and Brex are the two names most commonly associated with U.S. startups, especially venture-backed tech companies. After those, American Express and Mercury are also commonly used; some startups use a spend-management card alongside a traditional business card.

A useful caveat: there isn’t a single definitive census of startup card usage, and rankings vary by sample. In Pilot’s May 2025 analysis of 1,700+ tech companies, Brex and Ramp led; Mercury was a notable smaller player. A separate finance-stack survey also put Ramp first, with AmEx and Brex next. (pilot.com)

So, as a quick shorthand:

1. Ramp — one of the most prevalent startup spend-management cards
2. Brex — another major choice, particularly among funded startups
3. American Express — often used for traditional credit and travel rewards
4. Mercury — a common option for startups already using Mercury for banking

Exact order depends on whether you mean venture-backed tech startups, all small businesses, or cards used for particular purposes like travel.

I couldn't find usage-share data, so I can't say which cards are used most often. The sources below are mostly vendor blogs and affiliate-driven comparison sites, so treat them as a guide to what's commonly recommended rather than a market ranking.

Fintech corporate cards (the most-cited options for venture-backed startups)

• Brex: Often named the top pick for funded startups. One guide calls it the best corporate card overall and notes that your company only needs $50,000 in the bank to qualify. Approval is based on the business rather than personal credit.
• Ramp: Usually recommended for cost control and expense automation. One comparison says bootstrapped or growing businesses with at least ~$25,000 in the bank get the most from Ramp. Another lists its $0 annual fee, no personal guarantee as standout features.
• Mercury (IO Card), Rho, and BILL Divvy: These appear frequently in lists. Mercury's card is tied to its banking product, Rho is pitched as a banking-plus-card bundle, and BILL Divvy is described as suited to budget-focused teams with lower cash requirements.

Traditional bank and card-issuer options

• Chase Ink Business (Unlimited, Cash, Preferred): A common pick for bootstrapped founders. Guides note these cards usually require a personal guarantee.
• American Express Business (Blue Business Plus, Gold, Platinum): Popular for rewards and travel perks. Amex business cards typically require good personal credit.
• Capital One Spark: Often suggested for founders with fair or limited credit.

How sources suggest choosing
Most guides split the market by cash position. Traditional bank cards tend to suit founders who have little cash but good personal credit, while fintech cards suit companies with a funded bank balance. One guide suggests Chase and Amex still dominate the traditional side for most bootstrapped founders, with Ramp and Brex becom[ing] realistic once the company holds meaningful cash or has outside funding.

Current terms, minimum balances, and rewards change often, so check each issuer's site before applying.

The market for US startup corporate cards is dominated by a few key fintech platforms that have moved beyond just offering credit to providing comprehensive "finance stacks" (banking, expense management, and spend control).

As of late 2026, the most widely used and recommended corporate cards for US startups include the following:

1. Brex

Brex is arguably the most well-known name in the startup ecosystem. It is widely favored by venture-backed startups because it was designed specifically for companies that may not have traditional credit history but do have cash in the bank.

• Key Strengths: High credit limits (often based on cash balance), no personal guarantees, and a robust platform that includes bill pay, travel management, and global payments.
• Best For: Scaling and venture-backed startups that need a unified platform for cards, expenses, and treasury management.

2. Ramp

Ramp has seen significant growth by positioning itself as an "expense management" and "cost-control" platform. It is highly popular among companies that prioritize efficiency and want to automate their accounting processes.

• Key Strengths: Advanced AI-driven spend forecasting, automated expense reporting, and granular spend controls. It is often praised for its clean interface and ability to help teams cut unnecessary software or vendor spend.
• Best For: Cost-conscious teams and companies that want deep insights into where their money is going.

3. Mercury

While primarily known as a banking platform for startups, Mercury offers its own corporate cards that integrate seamlessly with its checking and treasury products.

• Key Strengths: Deep integration with the startup's primary banking hub. Many founders choose Mercury for its "no-frills" but highly functional banking experience, often pairing it with a spend management tool like Ramp later on.
• Best For: Early-stage founders who want a simple, integrated banking and card experience from day one.

Comparison Summary

Other Notable Mentions

• BILL Spend & Expense (formerly Divvy): A strong contender for mid-market businesses and startups that prioritize budget-first controls and approvals.
• Rho: Often cited for combining banking and corporate cards with flexible repayment terms.
• American Express (Business Gold/Platinum): Still widely used by startups that have higher travel needs or prefer the traditional rewards/brand trust associated with Amex.

Recommendation for Founders:
In 2026, the common "playbook" for many startups is to open a Mercury account for core banking, and then issue Ramp cards for the team to manage expenses. However, if your startup is venture-backed and you want to keep your entire financial stack (cards, banking, and bill pay) under one roof, Brex remains the most common all-in-one solution.

Brex and Ramp appear to be the most widely used corporate-card providers among U.S. startups, with Mercury also a common choice, especially among early-stage companies using its banking platform.

The clearest recent usage figures I found come from Pilot’s analysis of anonymized card data from more than 1,700 tech companies: for May 2025, it reports Brex at 54.5%, Ramp at 36.0%, American Express at 15.6%, and Mercury at 8.7%. These figures add up to more than 100%, so they likely reflect companies using more than one card—not exclusive market shares. ⁵

So, as a practical shortlist: Brex and Ramp first; Mercury next; then Amex and other providers. The ranking can vary by startup stage and by whether “widely used” means number of companies, card spend, or payment volume. ⁵⁶