Mercury
Startup Financial Operating System
Build, manage and automate your startup finances from one platform. Mercury isn't just a bank account—it's the financial hub for modern tech companies, integrating banking, treasury, cards, and automation.
Best for VC-backed Startups, SaaS, AI Companies, Tech Startups, and US LLCs.
Decision Indicators
Kiree Verdict
Best For
- • VC-backed & Bootstrapped Startups
- • SaaS & AI Companies
- • Tech Startups (US LLC / C-Corp)
- • Software Development Agencies
- • Founders Needing Deep API Access
Not Recommended For
- • Need Merchant Account (Stripe/PayPal)
- • Retail / Physical POS Businesses
- • High-risk / Regulated Industries
- • Cash-heavy Businesses
Startup Eligibility Checker
Evaluate your startup's eligibility based on your company structure and founder location.
Yes
Eligible
Checking
Available
Treasury
Available
IO Card
Likely Eligible
API Access
Available
Operating Accounts: Checking & Savings
Customers → Mercury Checking
Mercury Checking → Payroll / Bills
Idle Cash → Mercury Treasury
Account Features
- • $0 Monthly Fees & $0 Minimums
- • Free Domestic & USD International Wires
- • Instant Transfers between Accounts
- • Advanced Permission Controls
Mercury Treasury: Idle Cash Optimizer
Up to 5.4%*
Annual Yield
Institutional
Money Market Funds
Instant
Liquidity Access
Idle Cash Potential: $1M Balance → ~$54,000 Annual Return
IO Corporate Card: Spend with 1.5% Cashback
Card Capabilities
- • 1.5% Cashback on all spend
- • Unlimited Virtual Cards for SaaS/Ads
- • Physical Cards for team travel
- • Granular spend controls per employee
Expense Workflow
Issue Card to Employee
Spend with Limits & Rules
Auto-Sync to Accounting
Bill Pay & Approval Automations
Invoice Upload
Slack Approvals
Auto-Pay Rules
Sync to Xero
Developer API: Automate Your Finance
Mercury's API allows you to programmatically manage accounts, payments, transactions, and cards. Build your own custom financial automations.
// Example: Send ACH Payment via API
POST /v1/payments
{
"amount": 5000.00,
"method": "ach",
"recipient": "..."
}
API Capabilities
- • Accounts & Balances API
- • Payments & Transfers API
- • Transaction Data Sync
- • Virtual Card Issuing API
Recommended Startup Stack
SaaS / AI Startup
Revenue: Stripe / App Store
Operating: Mercury Checking
Growth: Mercury Treasury
Accounting: Xero / NetSuite
Tech Agency / Remote Team
Invoicing: Mercury Bill Pay
Team Spend: Mercury IO Cards
Payroll: Gusto / Deel
Accounting: QuickBooks
Mercury Limitations
Not a Merchant Account
Mercury cannot process credit cards on your website; you need Stripe or Adyen.
US Business Focus
Primarily designed for US-registered entities (LLC / C-Corp).
No Cash Deposits
You cannot deposit physical cash into your Mercury account.
High-risk Restrictions
Regulated or high-risk industries may face stricter eligibility requirements.
Mercury vs Alternatives
Mercury vs Brex
Both are top startup choices. Mercury is often preferred for its banking UX and API, while Brex is strong in enterprise expense management.
Mercury vs Wise
Wise is a global money platform for FX. Mercury is a full-service financial OS for US-based tech companies.
Mercury vs Relay
Relay is great for small business cash flow. Mercury is built for tech startups looking to scale and manage venture capital.
Frequently Asked Questions
Is Mercury a bank?
Mercury is a financial technology company, not a bank. Banking services are provided by Choice Financial Group and Evolve Bank & Trust; Members FDIC.
Can non-US residents open a Mercury account?
Yes, as long as you have a registered US entity (LLC or C-Corp). Mercury is a top choice for global founders with US companies.
What are the fees?
Mercury offers free checking and savings accounts with no monthly fees, no minimum balance requirements, and free domestic/USD international wires.