Mercury vs Relay vs Brex: Best Startup Bank Account
Mercury is best all-around. Relay excels at budgeting. Brex offers credit for funded startups. Here's how to choose your startup bank.
Introduction
Traditional banks weren't built for startups. Slow account opening, confusing fees, bad software, and no understanding of founder needs.
New fintech banks (Mercury, Relay, Brex) are designed specifically for startups. They understand how startups operate and build features for that context.
Here's how to choose the right one for your startup.
How Do These Banks Compare?
A direct comparison of the three most popular startup banks.
| Factor | Mercury | Relay | Brex |
|---|---|---|---|
| Best for | General purpose | Cash management | Funded startups |
| Account fees | $0 | $0 | $0 |
| Minimum balance | $0 | $0 | $0 |
| FDIC insurance | $5M+ | $3M+ | $6M+ |
| Debit cards | Yes | Yes | Yes |
| Credit | Yes (limited) | No | Yes (generous) |
| Integrations | Excellent | Good | Excellent |
| Wire fees | $5 domestic | $5 domestic | $0 |
| Mobile app | Good | Good | Good |
| Account opening | Fast | Fast | Fast |
The core positioning:
- Mercury: All-around excellent for most startups
- Relay: Best for managing cash across multiple purposes
- Brex: Best credit options for funded startups
They're all good: Unlike traditional banks, all three are designed for startups. You can't go terribly wrong.
When Does Mercury Win?
Mercury is the default choice for most startups.
General-purpose banking: If you just need a good business bank that works well, Mercury delivers.
Clean, modern interface: Mercury's software is intuitive. Transactions, transfers, and account management just work.
Startup-focused features:
- Multiple accounts and virtual cards
- Good integrations with accounting software
- Treasury for higher interest on deposits
- Mercury Credit (for eligible companies)
Early stage: Mercury works well from day one through growth. No pressure to have funding or high balances.
Who should choose Mercury:
- Most startups (it's the safe default)
- Teams wanting a clean, simple experience
- Companies that may or may not raise VC
- Anyone frustrated with traditional banks
Mercury's strengths:
- Excellent user experience
- No hidden fees
- Easy account management
- Good customer service
- Startup-friendly
When Does Relay Win?
Relay excels at cash flow visibility and management.
Cash management: Relay lets you create multiple accounts (up to 20) to organize cash for different purposes: taxes, payroll, operations, etc.
Budgeting discipline: The multi-account approach forces budget consciousness. See exactly what you've allocated and what remains.
Profit First methodology: If you follow Profit First or similar allocation approaches, Relay is built for this.
Visibility: Dashboard shows all accounts and balances at a glance. Cash position is immediately clear.
Who should choose Relay:
- Bootstrapped companies focused on cash management
- Founders who want budgeting structure
- Teams using Profit First or similar systems
- Anyone who wants clear cash visibility
Relay's strengths:
- Multiple accounts without multiple banks
- Clear cash visibility
- Budgeting and allocation tools
- Free ACH and wire transfers
- Good for bootstrapped discipline
When Does Brex Win?
Brex is designed for funded startups needing credit.
Credit for startups: Brex offers corporate cards with limits based on your funding and cash balance, not personal credit.
Higher credit limits: Funded startups can get $50K-$500K+ in credit. Much higher than traditional business cards.
Expense management: Beyond banking, Brex handles expense tracking, receipt capture, and approval workflows.
No personal guarantee: Brex cards don't require personal guarantees. Your personal credit isn't on the line.
Venture-backed focus: Brex's features and credit models are designed around the VC-backed startup experience.
Who should choose Brex:
- Funded startups wanting credit
- Companies with significant expenses
- Teams needing expense management
- Anyone wanting to avoid personal guarantees
Brex's strengths:
- High credit limits for funded companies
- No personal guarantee
- Integrated expense management
- Rewards optimized for startup spending
- Growing treasury features
What About Traditional Banks?
Traditional banks still have a place for some startups.
When traditional banks make sense:
Physical banking needs: Cash deposits, in-person service, and branch access. Fintech banks are digital-only.
Established credit relationships: If you have a banking relationship that provides credit, maintaining it may be worthwhile.
SBA loans: Traditional banks often have better SBA lending relationships.
Local relationships: Community banks sometimes offer better service and flexibility for local businesses.
The hybrid approach: Many startups use both: a fintech bank for daily operations and a traditional bank for specific needs.
Traditional bank options:
- Chase: Widespread, decent startup services
- Bank of America: Similar to Chase
- Silicon Valley Bank (now part of First Citizens): Startup-focused traditional bank
- Local credit unions: Often good rates and service
What traditional banks get wrong: Slow account opening, complex fees, bad software, requirement for existing credit history, and lack of understanding of startup needs.
How Do You Choose?
Match your choice to your situation.
Question 1: Are you funded? Yes and want credit → Brex No or don't need credit → Continue
Question 2: Is cash management discipline a priority? Yes → Relay No → Continue
Question 3: Do you just want a good, simple bank? Yes → Mercury
The safe choice: If you're unsure, choose Mercury. It works well for most situations and has no meaningful downsides.
Switching is possible: Unlike many business decisions, switching banks is straightforward. Open a new account, move funds, update payment methods. It's work but not catastrophic.
Multiple accounts: Some startups use multiple banks: Mercury for daily operations, Brex for credit and expense management. This adds complexity but provides options.
Frequently Asked Questions
Is my money safe with these banks?
Yes. All offer FDIC insurance through banking partners. Check current coverage amounts as they vary.
Can I open an account before incorporating?
No. You need a business entity and EIN. These banks serve businesses, not individuals.
How long does account opening take?
Typically 1-3 days. Much faster than traditional banks. Some approvals are instant.
Do I need a minimum balance?
No. All three have no minimum balance requirements.
Can I deposit checks?
Yes, via mobile deposit. This is standard across all three.
What about international transfers?
All support international wires. Fees and rates vary. Mercury and Brex have better international capabilities than Relay.
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