Softwr

Accounting · head to head

Brex vs Paychex

Brex logo

Brex

Accounting

The financial stack for growing businesses

From
Free
Rated
-
Full reviewWebsite
Paychex logo

Paychex

Accounting

Outsourced United States payroll, tax filing, benefits and HR services with an assigned service representative

From
$29/month
Rated
-
Full reviewWebsite

The short version

  • Only Brex has a free tier, so it costs nothing to try first.
  • Each has a real cost: Brex the free Essentials tier is limited to two legal entities; Paychex pricing is quoted rather than published and varies between clients and between renewals, with separate charges for each payroll run, off cycle payments and year end processing, so two similar businesses regularly pay very different amounts for the same service and comparing quotes is difficult by design.
  • They diverge on capability: Brex covers Corporate cards, Paychex covers Payroll processing.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Brex and Paychex actually diverge.

Attributes where Brex and Paychex differ
AttributeBrexPaychex
Starting priceFree$29/month
Free tierYesNo
Founded20171971

Identical on both: pricing model (subscription), platforms (Web, Ios, Android), user rating (Not yet rated), category (Accounting).

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 Brex

  • Corporate cards
  • Business accounts
  • Expense management
  • Bill pay
  • Travel
  • QuickBooks
  • NetSuite
  • Xero

Only in Paychex

  • Payroll processing
  • Payroll tax filing
  • Year end forms
  • Multi state payroll
  • Garnishments
  • Time and attendance
  • Benefits administration
  • Retirement plans

What people use each for

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

Brex

  • Corporate cards with spend controls for startupsnot Paychex
  • Expense management and reimbursementsnot Paychex
  • Travel booking inside the spend platformnot Paychex
  • Bill pay and accounting system syncnot Paychex
  • Multi-entity spend management on the paid tiersnot Paychex

Paychex

  • A United States business with employees in several states that does not want to track differing withholding and unemployment rules internallynot Brex
  • A small employer whose accountant recommends outsourcing payroll tax filing so the penalty risk sits with a service providernot Brex
  • A growing company that wants payroll, benefits enrolment and a retirement plan administered together rather than through three vendorsnot Brex
  • A small employer seeking benefits pricing through a professional employer organisation that it could not negotiate on its own headcountnot Brex

Where each one falls short

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

Brex

  • The free Essentials tier is limited to two legal entities
  • Premium is $12 per user per month, so cost scales with headcount using the card
  • Enterprise and Smart Card pricing is not published
  • Eligibility criteria are not stated anywhere on the pricing page, which matters for a product that extends credit

Paychex

  • Pricing is quoted rather than published and varies between clients and between renewals, with separate charges for each payroll run, off cycle payments and year end processing, so two similar businesses regularly pay very different amounts for the same service and comparing quotes is difficult by design.
  • Charging per payroll run rather than per month penalises employers who pay weekly or who run frequent off cycles, so a business with hourly staff on a weekly cycle pays several times what a monthly salaried business of the same size pays.
  • Migrating mid year requires transferring year to date wage and tax figures for every employee in every jurisdiction, so in practice companies switch only at a calendar year end, which leaves you locked to the incumbent for the rest of the year whatever the service is like.
  • The service model depends on an assigned representative, and reported experience varies sharply with who that person is and how often the assignment changes, which means the quality of what you bought is not a property of the product you evaluated.
  • It is a United States service, so a company with employees abroad still needs a separate payroll provider in each country, and the group has no single view of employment cost without building one outside the system.

Pricing, plan by plan

Brex

Free
  • EssentialsFree
    • Global card acceptance
    • Accounting integrations
    • Real-time reporting
  • Premium$12/month
    • per user
    • Custom expense policies
    • Dynamic approval chains
  • Enterprise$null/month
    • Custom pricing

Paychex

$29/month
  • Flex Essentials$39/month
    • Payroll
    • Tax administration
    • Direct deposit
  • Flex Select$59/month
    • HR administration
    • State unemployment insurance
    • New hire reporting

Which should you pick?

Choose Brex if

  • You need corporate cards.
  • You want to start without paying.
  • You work on Web, Ios, Android.
  • You also want business accounts.
Brex review

Choose Paychex if

  • You need payroll processing.
  • You work on Web, Ios, Android.
  • You also want payroll tax filing.
Paychex review

Questions people ask

Is Brex or Paychex better?
Neither clearly leads. Brex starts at Free and Paychex at $29/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Brex or Paychex?
Brex has a free tier; the other does not. Paid plans start at Free for Brex and $29/month for Paychex.
Does Brex or Paychex run on more platforms?
Both run on Web, Ios, Android, so platform support will not decide this one for you.
Can I use Brex for free?
Yes. Brex has a free tier, so you can try it without paying. Paychex starts at $29/month.
What is Brex best used for?
Brex is most often used for corporate cards with spend controls for startups, expense management and reimbursements, travel booking inside the spend platform, bill pay and accounting system sync. Of those, corporate cards with spend controls for startups and expense management and reimbursements are not what Paychex is typically brought in for.
What can Brex do that Paychex cannot?
Brex covers Corporate cards, Business accounts, Expense management, Bill pay. Paychex covers Payroll processing, Payroll tax filing, Year end forms, Multi state payroll.

Answered from the vendors’ own pages

Brex: Does Brex have a free plan?

Yes. Brex Essentials is free for startups and growing companies and includes global card acceptance, AI-powered rules, accounting integrations, real-time reporting, and bill pay.

Source
Paychex: How much does it cost?

Paychex quotes per client rather than publishing rates, and the structure typically includes a base fee plus a per employee per payroll charge with extras for year end and off cycle runs. Get the full fee schedule in writing, including what a mid year change of plan costs.

Brex: What is Brex Premium pricing?

Brex Premium costs $12 per user per month and is designed for mid-sized companies. It adds custom expense policies, dynamic approval chains, AI compliance auditing, multi-entity support, and live budgets.

Source
Paychex: Who is liable if payroll taxes are filed late or wrongly?

Contractually the provider generally accepts responsibility for errors it makes, but the employer remains the party the tax authorities pursue. Read the specific indemnity language rather than relying on the sales description.

Brex: What countries accept Brex cards?

Brex cards are accepted in 210+ countries. The Smart Card plan offers local-currency cards in 50+ countries for companies focused on procurement simplification and international payments.

Source
Paychex: Can I switch providers mid year?

Technically yes, but you must carry year to date figures across for every employee and jurisdiction, and errors there surface at year end on employee tax forms. Most businesses switch effective 1 January for that reason.

Paychex: What is the difference between the standard service and the professional employer organisation option?

Under the professional employer organisation arrangement Paychex becomes a co-employer for tax and benefits purposes, which changes your benefits access and some of your employment administration. It costs more and it is harder to unwind, so treat it as a different decision from buying payroll.

Paychex: Does it work with my accounting software?

It exports a general ledger file and connects to the mainstream accounting products. Confirm the mapping to your chart of accounts during onboarding, because a generic export means your bookkeeper recodes every run.

Paychex: Is it suitable if we only have a few employees?

It will serve you, but very small employers often find the per run charges and the service tiering expensive relative to self service payroll products. The case improves once multi state complexity or benefits administration enters the picture.

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