Banking & Finance
Brex
Corporate cards and spend management for incorporated businesses
Solid Option
A solid corporate card for incorporated STR companies — but not an STR tool
From $0 • No free trial
Comparison
Brex vs Mercury
Pricing, pros and cons, and buyer-fit side-by-side. Pick the one that matches your operation — or see why neither should.
Banking & Finance
Mercury
Business banking for STR LLCs — free checking with deep accounting sync
Solid Option
Solid free LLC banking layer for U.S. STR operators — but not a property tool
From $0 • No free trial
✓Editorial verdict
Which Should You Pick: Brex or Mercury?
Pick Brex if your incorporated STR company needs corporate cards with no personal guarantee, per-user expense policies, and ERP-grade sync into NetSuite or Sage Intacct. Pick Mercury if you need a full business checking account to receive PMS payouts and pay vendors — Brex is a card and spend-management layer, not a bank, so most operators who choose Brex still run a banking product like Mercury underneath it.
Editorial perspective from the Brex side; factual claims about Mercury are drawn from its review.
Pricing Side-by-Side
Brex
Full pricing →From $0 • No free trial
Essentials
$0/user/month
- Corporate cards with basic policy controls
- Expense management for startups and growing companies
Premium
$12/user/month
- Multiple, customizable expense policies
- AI-powered compliance audit detection
Enterprise
Custom pricing
- For global enterprises with custom needs
- Tailored controls and onboarding
Smart Card
Custom pricing
- Procurement-focused card program
- For companies that want to simplify procurement
Mercury
Full pricing →From $0 • No free trial
Mercury (Free)
$0/mo
- No account minimums or monthly fees
- No overdraft or account opening fees
- Free domestic and international USD wires (standard SHA)
Mercury Plus
$29.90/mo
- Invoice with ACH debit at $1/transaction
- Reimbursement for up to 20 users/month, then $5/additional active user
- Annual pricing $23.95/mo (15% discount)
Mercury Pro
$299/mo
- Invoice with ACH debit at $0/transaction
- Up to 250 active users, then $5/additional active user
- Annual pricing $239.90/mo (15% discount)
What each tool does well — and where it falls short
What Brex does well
No personal guarantee or personal credit pull
Brex's credit-card product page states 'Brex does not require a personal guarantee' and underwrites using business data like revenue and expense profile — useful for STR operators who don't want a property-LLC card tied to their FICO.
Free Essentials tier with full card and expense functionality
Brex's pricing page lists Essentials at $0/user/month, meaningful for early-stage STR operators who don't yet need Premium's customizable expense policies or AI compliance audit detection.
Named ERP integrations cover the STR finance stack
Brex's integrations directory lists Oracle NetSuite, QuickBooks Desktop, Sage Intacct, SAP Concur, Workday Financials ERP, and Xero — the same accounting stack STR finance leads typically already run.
What Mercury does well
Free core checking with no monthly fee or minimums
The pricing page advertises $0/mo with no account minimums, overdraft fees, monthly fees, or account opening fees — so the operating account behind your LLC costs nothing, and only optional invoicing/bill-pay tooling is a paid SKU.
Free USD wires plus multi-bank FDIC sweep up to $5M
NerdWallet's 2026 review confirms free domestic and international USD wires and a partner-bank sweep network providing up to $5M of FDIC coverage — useful for paying overseas cleaners and parking large reserves.
Native read/write API and direct accounting sync
Every Mercury account ships with API access and connects to QuickBooks, NetSuite, and Xero in a few clicks per the vendor's accounting-automations page, which pairs cleanly with monthly STR bookkeeping flows.
Where Brex falls short
Eligibility excludes most independent STR hosts
Nav's review states 'Sole proprietors, individual consumers, and unincorporated partnerships aren't eligible,' with funded startups typically needing a $50K minimum cash balance and self-funded businesses needing $1M+ in annual revenue.
Cash-back redemption is materially lower than headline multipliers suggest
Nav reports cash-back redeems at 0.6 cent per point versus 1 cent through Brex travel — so advertised 7x rideshare or 3x restaurant points only realize ~0.6% as cash for an STR operator not booking travel through Brex.
International payment friction for non-US portfolios
Brex restricts eligibility to U.S.-incorporated companies, and Capterra's review summary flags 'Limited currency support (USD only)' and 'High international payment fees' — a hard limit for operators with EU or LATAM units.
Where Mercury falls short
Not a bank — sudden account closures documented across reviewers
NerdWallet 2026 notes Mercury is a fintech working with partner banks and that account closures without warning are a documented pattern across BBB, Trustpilot, and Reddit. A frozen account holding Airbnb/Vrbo payouts is a real operational risk.
No cash deposits and slow ACH timing flagged by users
Operators who collect cash for late checkouts, pet fees, or on-site upsells have no path to deposit those funds, and NerdWallet 2026 notes ACH transfer times can be slow.
U.S.-only and not built for short-term rental
Mercury's homepage names SaaS, ecommerce, agencies, VC funds, and crypto as target verticals — not vacation rental — and there is no channel manager, calendar, guest comms, or owner-statement module. It is a horizontal banking layer.
Which Should You Pick
Pick Brex if
Larger U.S.-incorporated STR management companies (LLC / S-corp / C-corp) on QuickBooks, Xero, NetSuite, or Sage Intacct that want corporate cards plus per-employee expense controls without a personal guarantee.
Skip Brex if
You're a sole-proprietor host, an unincorporated partnership, or below Brex's funding/revenue thresholds (Nav cites $50K minimum cash balance for funded startups and $1M+ revenue for self-funded businesses).
Pick Mercury if
U.S.-incorporated STR operators running 1–50 listings under an LLC who need a no-fee business checking account that ingests PMS payouts and syncs to QuickBooks, Xero, or NetSuite for monthly bookkeeping.
Skip Mercury if
You are not a U.S. business entity, you need to deposit on-site cash, or you want a single integrated PMS+payments+banking stack.
Where Brex and Mercury actually differ
- Core product: Brex is a corporate card and spend-management platform; Mercury is a business checking account with cards and wires — Brex sits on top of your bank, not in place of it.
- Eligibility: Brex requires U.S. incorporation and excludes sole proprietors and unincorporated partnerships; Mercury opens accounts for U.S. business entities broadly, including single-member LLCs.
- Pricing model: Brex charges per user ($0 Essentials, $12/user/mo Premium); Mercury charges a flat fee per company ($0, $29.90/mo Plus, $299/mo Pro) regardless of team size.
- ERP integrations: Brex natively syncs spend data to QuickBooks, Xero, NetSuite, and Sage Intacct; Mercury syncs bank transactions to QuickBooks Online, Xero, and NetSuite — Mercury does not list Sage Intacct.
- API access: Mercury exposes an open REST API on every account; Brex's API access is listed as limited, leaning on Zapier and pre-built connectors for most automation workflows.
Common objections
- Mercury is free — why would I add Brex on top?
- They solve different problems. Mercury is your operating bank account for receiving payouts and paying vendors. Brex is a card program with expense controls and no personal guarantee. Brex Essentials is also $0/user/mo, but it doesn't replace a checking account — most operators run both.
- I'm a small STR operator with an LLC — should I start with Brex?
- Probably not. Brex's segment fit for small portfolios is a skip — eligibility requires incorporation with meaningful revenue, and sole proprietors are excluded outright. Mercury's free tier is built for exactly your stage: open an account, receive PMS payouts, sync to QuickBooks or Xero. Consider adding Brex later when you need corporate cards with per-employee spend limits.
- Does Brex's Sage Intacct integration matter for STR operators?
- Only if you're already on Sage Intacct, which typically means a larger management company. Mercury doesn't list Sage Intacct as an integration, so if Intacct is your ERP, Brex is the stronger card layer. For QuickBooks or Xero shops both tools sync natively and the ERP difference is moot.
Keep Digging
Brex
A solid corporate card for incorporated STR companies — but not an STR tool
Mercury
Solid free LLC banking layer for U.S. STR operators — but not a property tool