Softwr

Accounting · head to head

Brex vs Karbon

Brex logo

Brex

Accounting

The financial stack for growing businesses

From
Free
Rated
-
Full reviewWebsite
Karbon logo

Karbon

Accounting

Practice management for accounting firms

From
$59/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; Karbon monthly billing option only available for teams of 4 or more users
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Brex and Karbon actually diverge.

Attributes where Brex and Karbon differ
AttributeBrexKarbon
Starting priceFree$59/month
Free tierYesNo
PlatformsWeb, Ios, AndroidWeb
Founded2017Unknown

Identical on both: pricing model (subscription), 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 Karbon

Nothing recorded that Brex does not also cover.

What people use each for

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

Brex

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

Karbon

  • Automating client document collection for tax practice intakenot Brex
  • Tracking all client requests in workflows tied to jobsnot Brex
  • Aligning hours worked with billable time per engagementnot Brex
  • Automating period close by connecting practice management to accountingnot Brex
  • Streamlining client document submission and approval workflowsnot 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

Karbon

  • Monthly billing option only available for teams of 4 or more users
  • Team plan at $59/month per user minimum cost may be expensive for smaller practices
  • No seat license discounts published; scaling costs linearly with user count

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

Karbon

$59/month
  • Team$59/month
    • Per-user pricing
    • Designed for small accounting firms
    • Minimum team size of 4 for monthly billing
  • Business$89/month
    • Per-user pricing
    • Workflow automation
    • Integrations for growing practices
  • Enterprise$null/mo
    • Custom pricing
    • Tailored for large accounting firms
    • Dedicated support

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 Karbon if

Nothing in the data separates Karbon from Brex on the points above - pick on price and on how each one feels to use.

Karbon review

Questions people ask

Is Brex or Karbon better?
Neither clearly leads. Brex starts at Free and Karbon at $59/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Brex or Karbon?
Brex has a free tier; the other does not. Paid plans start at Free for Brex and $59/month for Karbon.
Does Brex or Karbon run on more platforms?
Brex runs on Web, Ios, Android. Karbon runs on Web.
Can I use Brex for free?
Yes. Brex has a free tier, so you can try it without paying. Karbon starts at $59/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 Karbon is typically brought in for.
What can Brex do that Karbon cannot?
Brex covers Corporate cards, Business accounts, Expense management, Bill pay.

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
Karbon: How much does Karbon cost?

Karbon pricing starts at $59 per user per month (Team plan, billed annually) or $79 per user per month (monthly billing for 4+ users). Business plan is $89/month annual or $99/month monthly. Enterprise pricing is custom.

Source
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
Karbon: Is there a discount for annual billing on Karbon?

Yes, Karbon offers annual billing at a discount compared to monthly. Team plan is $59/month annually versus $79/month monthly. Business plan is $89/month annually versus $99/month monthly.

Source
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
Karbon: What is the minimum user requirement for monthly billing on Karbon?

Karbon requires a minimum team size of 4 users to access monthly billing. Teams smaller than 4 must choose annual billing.

Source
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