Softwr

Accounting · head to head

Mercury vs Monzo

Mercury logo

Mercury

Accounting

Banking for startups

From
Free
Rated
-
Full reviewWebsite
Monzo logo

Monzo

Personal Finance

UK-licensed digital bank with FSCS-protected deposits and no foreign currency card fees

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Mercury treasury access requires a $250,000 balance held with Mercury; Monzo monzo is UK-focused, so customers wanting deep multi-currency holding, broad international transfers or in-app investing will find its feature set narrower than Revolut.
  • They diverge on capability: Mercury covers Business checking, Monzo covers FSCS-protected deposits.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Mercury and Monzo actually diverge.

Attributes where Mercury and Monzo differ
AttributeMercuryMonzo
Pricing modelfreemiumFree core current account; paid Plus and Premium tiers add features
PlatformsWeb, Ios, AndroidiOS, Android, Web
CategoryAccountingPersonal Finance
Founded2019Unknown

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Mercury

  • Business checking
  • Savings accounts
  • Virtual cards
  • Team management
  • API access
  • QuickBooks
  • Xero
  • Stripe

Only in Monzo

  • FSCS-protected deposits
  • Fee-free foreign spending
  • Savings Pots
  • Joint and shared accounts
  • Instant spending notifications
  • Overdrafts and loans

What people use each for

The jobs each tool is most often brought in to do.

Mercury

  • Business banking and payments for startupsnot Monzo
  • Managing treasury, invoicing and corporate cards from one accountnot Monzo

Monzo

  • A UK resident wanting a free current account with statutory FSCS deposit protection rather than e-money safeguardingnot Mercury
  • A frequent traveller wanting free foreign currency card spending on a UK-regulated accountnot Mercury
  • A household wanting a joint account with shared budgeting and spending visibilitynot Mercury
  • Someone building savings using automated Pots with partner-bank interest rather than a separate savings accountnot Mercury

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Mercury

  • Treasury access requires a $250,000 balance held with Mercury
  • Non USD international wires carry a 1% conversion fee
  • Choosing OUR wire coding, which covers intermediary bank charges, costs $15 per wire
  • ACH invoicing is $1 per transaction on Mercury Plus and only free on the $299 a month Pro plan
  • Advanced and recurring invoicing require Mercury Plus at $29.90 a month

Monzo

  • Monzo is UK-focused, so customers wanting deep multi-currency holding, broad international transfers or in-app investing will find its feature set narrower than Revolut.
  • Overdraft and loan products carry interest charges based on individually assessed rates, and like any consumer credit product the cost varies by risk profile rather than being a flat, predictable fee.
  • Free ATM withdrawals abroad are capped at a monthly limit on the free tier, after which a fee applies, so heavy cash users abroad may find the free tier insufficient.
  • As an app-first bank with very limited physical presence, customers who prefer in-person branch banking or need to deposit cash regularly will find it inconvenient compared with a traditional high street bank.
  • Some paid-tier perks, such as travel insurance bundled into Premium, require reading policy terms carefully, since bundled insurance products can have narrower cover than a standalone policy bought separately.

Pricing, plan by plan

Mercury

Free
  • Mercury (Free)Free
    • ACH payments
    • Domestic wires
    • Real-time payments
  • Mercury Plus$29.9/month
    • Invoice ACH debits
    • Recurring invoices
    • Invoicing API (500/month)
  • Mercury Pro$299/month
    • All Plus features
    • Relationship manager
    • Free ACH invoice debits

Monzo

Free
  • Monzo (free)Free
    • Free current account with FSCS-protected deposits
    • Fee-free foreign currency card spending
    • Free ATM withdrawals abroad up to a monthly limit
  • Monzo Plus$5/month
    • Higher fee-free overseas ATM withdrawal limit
    • Custom card colours and virtual cards
    • Savings and budgeting extras
  • Monzo Premium$15/month
    • Travel and phone insurance included
    • Metal card
    • Airport lounge access on some plans

Which should you pick?

Choose Mercury if

  • You need business checking.
  • You want to start without paying.
  • You work on Web, Ios, Android.
  • You also want savings accounts.
Mercury review

Choose Monzo if

  • You need fscs-protected deposits.
  • You want to start without paying.
  • You work on iOS, Android, Web.
  • You also want fee-free foreign spending.
Monzo review

Questions people ask

Is Mercury or Monzo better?
Neither clearly leads. Mercury starts at Free and Monzo at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Mercury or Monzo?
Mercury starts at Free and Monzo at Free.
Does Mercury or Monzo run on more platforms?
Mercury runs on Web, Ios, Android. Monzo runs on iOS, Android, Web.
Can I use Mercury for free?
Both have a free tier, so you can try either at no cost before committing.
What is Mercury best used for?
Mercury is most often used for business banking and payments for startups, managing treasury, invoicing and corporate cards from one account. Of those, business banking and payments for startups and managing treasury, invoicing and corporate cards from one account are not what Monzo is typically brought in for.
What can Mercury do that Monzo cannot?
Mercury covers Business checking, Savings accounts, Virtual cards, Team management. Monzo covers FSCS-protected deposits, Fee-free foreign spending, Savings Pots, Joint and shared accounts.

Answered from the vendors’ own pages

Mercury: Is Mercury business banking free?

Mercury's base banking tier is free and includes ACH payments, domestic wire transfers, real-time payments, Bill Pay, and QuickBooks/Xero automations at no monthly cost.

Source
Monzo: Is Monzo a real bank?

Yes, Monzo Bank Limited holds a full UK banking licence and is regulated by the FCA and PRA, the same framework as traditional UK banks.

Mercury: What does Mercury Plus add beyond the free tier?

Mercury Plus costs $29.90 per month and adds invoice ACH debits, recurring invoice capabilities, invoicing API with 500 calls per month, unlimited 1099 filings, and access to partner benefits.

Source
Monzo: Are my savings protected if Monzo fails?

Eligible deposits are covered by the Financial Services Compensation Scheme up to 85,000 pounds per eligible person, the same statutory protection as other UK banks.

Mercury: Does Mercury charge monthly account fees?

No, Mercury states there are no minimum account balance requirements, overdraft fees, required monthly fees, or account opening fees. The free tier includes essential business banking, with paid tiers available for additional features.

Source
Monzo: Does Monzo charge for spending abroad?

No card fee applies for purchases abroad at the interbank exchange rate; free ATM withdrawals abroad are capped at a monthly limit before a fee applies.

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