Mercury vs Relay vs Brex vs Novo: Best Business Bank for Startups
The business bank account market for startups has never been better — or more confusing. Four fintech-first options dominate the conversation, and each makes a different bet on what founders actually need. The wrong choice is not catastrophic, but the right one saves time, fees, and headaches for years.
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The Quick Answer
Mercury for funded startups that want FDIC-extended coverage, a clean API, and strong treasury features. Relay for small businesses that want multi-account budgeting and bookkeeper collaboration. Novo for solo founders and freelancers who want fast setup and Stripe/Square integrations. Brex for venture-backed startups that want credit, banking, and expense management in one platform.
Side-by-Side Breakdown
Mercury: $0/month. FDIC coverage $250K standard, $5M+ through sweep network. Best features: treasury management, API, team permissions. Best for funded startups.
Relay: $0/month (Pro $30/month). FDIC coverage $3M through program. Best features: up to 20 checking accounts, bookkeeper seats, team cards. Best for small businesses with complex cash flow.
Novo: $0/month. FDIC $250K. Best features: fast setup, Stripe/Square/Shopify integrations, invoicing. Best for solo founders and e-commerce.
Brex: $0 basic, varies for full platform. FDIC $6M+ through sweep. Best features: corporate cards, expense management, reimbursements. Best for venture-backed teams.
When to Choose Mercury
Mercury is the default for funded startups and tech founders. The interface is excellent, the treasury sweep gives FDIC coverage well above $250K (important once you raise a round), and API access lets you build custom financial workflows. If you have investors, Mercury is likely what they have seen before and will not raise questions.
When to Choose Relay
Relay is built for business owners who think in buckets. You can open up to 20 checking accounts — one for operating expenses, one for taxes, one for payroll — and move money between them instantly. If you use the Profit First system or like keeping cash mentally separated by purpose, Relay is purpose-built for this. The bookkeeper seat feature is also excellent for businesses with an outside accountant.
When to Choose Novo
Novo is the fastest to open and most forgiving for early-stage founders. If you are a freelancer, solo consultant, or early e-commerce operator with Stripe or Shopify, Novo's integrations make reconciliation easy. Genuinely free with no minimum balance. Limitation: less sophisticated than Mercury for growing teams.
When to Choose Brex
Brex makes sense when you have a team generating real expense volume and want corporate cards, expense management, and banking in one place. Most compelling for venture-backed companies with 5-50 employees. For a solo founder, the complexity outweighs the benefit — start with Mercury or Novo and graduate to Brex when expense management is a real problem.
The Verdict
Mercury for most startups. Relay for budget-conscious small business operators. Novo for fast solo setup. Brex when you have a team and expense management is a real problem. All four are free to open — you can switch later, though updating payment details across vendors is a hassle worth avoiding.
How to Get Started
All four open online in minutes. You will need your EIN, LLC formation documents, and a government ID. Mercury and Relay sometimes have a short review period. Novo is typically the fastest to approve. Apply with the bank that fits your current stage.
RECOMMENDED TOOLS
Mercury
Best business banking for funded startups and tech founders
Relay
Multi-account banking built for budget management and bookkeeper collaboration
Novo
Fast setup with Stripe, Square, and Shopify integrations
Brex
Banking, corporate cards, and expense management for venture-backed teams
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FREQUENTLY ASKED QUESTIONS
Are these real banks or fintech apps?
They are fintech companies that partner with FDIC-member banks to hold your deposits. Your deposits are FDIC-insured, but you are not banking directly with a chartered bank.
Can I use one of these and also keep a traditional bank account?
Yes. Many founders use Mercury or Relay as their primary operating account and keep a local credit union or Chase account for in-person cash deposits.
What if I am not approved?
Mercury and Relay can decline applications, often due to business type or state restrictions. Novo is generally more permissive. If declined, try another option or use a traditional bank while you build account history.
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