Softwr

Accounting · head to head

Modern Treasury vs Square

Modern Treasury logo

Modern Treasury

Accounting

Payment operations and ledger infrastructure that sits between your product and your own bank accounts

From
On request
Rated
-
Full reviewWebsite
Square logo

Square

E-Commerce

Powering the economy

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Square has a free tier, so it costs nothing to try first.
  • Each has a real cost: Modern Treasury you must already have or be able to obtain your own bank accounts with the right connectivity, so early stage companies without a banking relationship cannot use it and are pushed towards a sponsor bank model instead.; Square plus plan pricing not specified in documentation
  • They diverge on capability: Modern Treasury covers Multi-rail payment initiation, Square covers Payment processing.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Modern Treasury and Square actually diverge.

Attributes where Modern Treasury and Square differ
AttributeModern TreasurySquare
Starting priceOn requestFree
Pricing modelquotefreemium
Free tierNoYes
PlatformsWebPOS (Mobile app), Web
CategoryAccountingE-Commerce
FoundedUnknown2009

Identical on both: 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 Modern Treasury

  • Multi-rail payment initiation
  • Bank connectivity
  • Ledgers
  • Automatic reconciliation
  • Approval workflows
  • Virtual accounts
  • Compliance tooling
  • Return and exception handling

Only in Square

  • Payment processing
  • Point of sale
  • Invoicing
  • Payroll
  • Banking
  • QuickBooks
  • WooCommerce
  • Wix

What people use each for

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

Modern Treasury

  • A marketplace paying out to thousands of sellers that needs a ledger its application can trust rather than reconciling a payments dashboard by handnot Square
  • A lender originating and servicing loans that must track disbursements, repayments and returns against its own bank accountsnot Square
  • A company that wants to move off a banking as a service provider and hold its own bank accounts after seeing sponsor banks offboard fintech programmesnot Square
  • An insurer handling premium collection and claims payment across several rails with approval controls and an auditable trailnot Square

Square

  • Accept payments with all-in-one POS applicationnot Modern Treasury
  • Online ordering and basic website creationnot Modern Treasury
  • Invoicing and appointment bookingnot Modern Treasury
  • Staff scheduling and loyalty programmesnot Modern Treasury

Where each one falls short

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

Modern Treasury

  • You must already have or be able to obtain your own bank accounts with the right connectivity, so early stage companies without a banking relationship cannot use it and are pushed towards a sponsor bank model instead.
  • Pricing rests on an annual minimum commitment, and companies that miss their volume forecast pay the minimum regardless, which makes the headline per-transaction rate close to irrelevant in year one.
  • Supported bank connectivity is a finite list, so if your bank is not on it you are either waiting for an integration or changing banks, which is a far larger project than adopting the software.
  • It is software over banking, not banking, so it does not solve card issuing, deposit accounts or the licensing questions that a company embedding financial products still has to answer elsewhere.
  • The ledger is genuinely good but adopting it properly means making it the source of truth for balances in your product, which is a significant application change rather than a payments integration and is where implementations run long.

Square

  • Plus plan pricing not specified in documentation
  • Processing fees differ by tier but exact rates not detailed
  • Free plan pricing mentioned but specific features for Plus unclear
  • Text marketing charged at 3¢ per message after first 500 included

Pricing, plan by plan

Modern Treasury

On request
  • Modern Treasury Platform$undefined/year
    • Platform access fee covering API, dashboard, infrastructure and support
    • Usage-based fees across ACH, wires, RTP, FedNow, push to card, cheques and stablecoins
    • A single annual minimum commitment that both platform and usage fees count towards

Square

Free
  • FreeFree
    • Accept payments with all-in-one POS app
    • Online site builder (ordering profiles, basic websites, online stores, booking sites)
    • Item library and inventory tracking
  • Plus$null/mo
    • All Free plan features
    • Advanced POS features for food, retail, and appointments
    • Lower processing fees on card transactions

Which should you pick?

Choose Modern Treasury if

  • You need multi-rail payment initiation.
  • You also want bank connectivity.
Modern Treasury review

Choose Square if

  • You need payment processing.
  • You want to start without paying.
  • You work on POS (Mobile app), Web.
  • You also want point of sale.
Square review

Questions people ask

Is Modern Treasury or Square better?
Neither clearly leads. Modern Treasury starts at On request and Square at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Modern Treasury or Square?
Square has a free tier; the other does not. Paid plans start at On request for Modern Treasury and Free for Square.
Does Modern Treasury or Square run on more platforms?
Modern Treasury runs on Web. Square runs on POS (Mobile app), Web.
Can I use Square for free?
Yes. Square has a free tier, so you can try it without paying. Modern Treasury starts at On request.
What is Modern Treasury best used for?
Modern Treasury is most often used for a marketplace paying out to thousands of sellers that needs a ledger its application can trust rather than reconciling a payments dashboard by hand, a lender originating and servicing loans that must track disbursements, repayments and returns against its own bank accounts, a company that wants to move off a banking as a service provider and hold its own bank accounts after seeing sponsor banks offboard fintech programmes, an insurer handling premium collection and claims payment across several rails with approval controls and an auditable trail. Of those, a marketplace paying out to thousands of sellers that needs a ledger its application can trust rather than reconciling a payments dashboard by hand and a lender originating and servicing loans that must track disbursements, repayments and returns against its own bank accounts are not what Square is typically brought in for.
What can Modern Treasury do that Square cannot?
Modern Treasury covers Multi-rail payment initiation, Bank connectivity, Ledgers, Automatic reconciliation. Square covers Payment processing, Point of sale, Invoicing, Payroll.

Answered from the vendors’ own pages

Modern Treasury: Is Modern Treasury a bank or a banking as a service provider?

Neither. You hold your own bank accounts and it is software over them. That avoids sponsor bank concentration risk but means you need the bank relationship yourself.

Square: Does Square offer a free plan?

Yes, Square's free plan includes an all-in-one POS app, online site builder, item library and inventory tracking, invoicing, appointment scheduling, staff calendars, and checking and savings account access. No subscription fees are charged.

Source
Modern Treasury: What does it cost?

Not published. A platform access fee plus usage fees across rails, on an annual term with a single minimum commitment. Negotiate the minimum, not the per-transaction rate.

Square: What does Square Plus add compared to the free plan?

Square Plus adds advanced POS features for food and retail, lower processing fees on card transactions, custom loyalty programs, unlimited email marketing campaigns, text messaging, and staff scheduling and attendance tracking.

Source
Modern Treasury: Which rails are supported?

ACH, wires, RTP, FedNow, push to card, cheques and stablecoin payments, subject to what your bank supports.

Modern Treasury: Do we still need our own compliance programme?

Yes. KYB, KYC and transaction monitoring are included in the platform, but you are the one holding the accounts and the regulatory obligation sits with you and your bank.

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