Softwr

Accounting · head to head

Fortnox vs Polar

Fortnox logo

Fortnox

Accounting

Swedish cloud accounting and business platform for bookkeeping, invoicing and payroll

From
Free
Rated
-
Full reviewWebsite
Polar logo

Polar

Accounting

Billing and revenue platform for AI and infrastructure companies

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Fortnox corporate packages alone span at least 7 named tiers (Mini through Stor+) priced from 209 kr/man to 919 kr/man, and add-on programs are billed separately per module (SEK); Polar percentage-based fees higher than some specialized processors for high-volume transactions
  • Prices and features above were last checked on 29 August 2026.

Where they differ

Only the attributes on which Fortnox and Polar actually diverge.

Attributes where Fortnox and Polar differ
AttributeFortnoxPolar
Pricing modelsubscriptionPercentage of transaction plus per-transaction fee
PlatformsWebWeb, API

Identical on both: starting price (Free), free tier (Yes), 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 Fortnox

Nothing recorded that Polar does not also cover.

Only in Polar

  • Usage Billing
  • Subscriptions
  • Seat Management
  • Prepaid Credits
  • Hosted Checkout
  • Cost Insights
  • Merchant of Record

What people use each for

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

Fortnox

  • Registering Swedish corporations with guided formation assistancenot Polar
  • Selling unpaid invoices to improve cash flownot Polar
  • Managing multiple client businesses from bureau dashboardnot Polar
  • Integrating payroll with Swedish banking automationnot Polar

Polar

  • Billing for token and API call consumption by LLM applicationsnot Fortnox
  • Managing tiered pricing for infrastructure usage-based servicesnot Fortnox
  • Handling subscription and usage hybrid modelsnot Fortnox
  • Monetizing AI APIs with usage metering and creditsnot Fortnox

Where each one falls short

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

Fortnox

  • Corporate packages alone span at least 7 named tiers (Mini through Stor+) priced from 209 kr/man to 919 kr/man, and add-on programs are billed separately per module (SEK)
  • The Fortnox Access verification tier is priced by transaction volume, rising from 9 kr/man at zero verifications to 199 kr/man at 1000+ verifications (SEK), so cost is not fixed and scales with usage

Polar

  • Percentage-based fees higher than some specialized processors for high-volume transactions
  • Merchant of record model may not suit companies preferring direct payment control
  • Free Starter tier limited with 5% fees reducing appeal for production use
  • Setup and integration effort required despite API simplicity

Pricing, plan by plan

Fortnox

Free
  • New Company TrialFree
    • 6-month free trial for newly started businesses

Polar

Free
  • StarterFree
    • 5% + $0.50 per transaction
    • Free tier for testing
    • Basic features
  • Pro$20/month
    • 3.8% + $0.40 per transaction
    • Full platform access
    • Cost insights
  • Growth$100/month
    • 3.6% + $0.35 per transaction
    • Priority support
    • Volume benefits
  • Scale$400/month
    • 3.4% + $0.30 per transaction
    • Dedicated support
    • Custom integration

Which should you pick?

Choose Fortnox if

  • You want to start without paying.
Fortnox review

Choose Polar if

  • You need usage billing.
  • You want to start without paying.
  • You work on Web, API.
  • You also want subscriptions.
Polar review

Questions people ask

Is Fortnox or Polar better?
Neither clearly leads. Fortnox starts at Free and Polar at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Fortnox or Polar?
Fortnox starts at Free and Polar at Free.
Does Fortnox or Polar run on more platforms?
Fortnox runs on Web. Polar runs on Web, API.
Can I use Fortnox for free?
Both have a free tier, so you can try either at no cost before committing.
What is Fortnox best used for?
Fortnox is most often used for registering swedish corporations with guided formation assistance, selling unpaid invoices to improve cash flow, managing multiple client businesses from bureau dashboard, integrating payroll with swedish banking automation. Of those, registering swedish corporations with guided formation assistance and selling unpaid invoices to improve cash flow are not what Polar is typically brought in for.
What can Fortnox do that Polar cannot?
Polar covers Usage Billing, Subscriptions, Seat Management, Prepaid Credits.

Answered from the vendors’ own pages

Fortnox: Does Fortnox offer a free trial?

Yes, newly started businesses receive their first six months in Fortnox at no cost, followed by subscription-based pricing.

Source
Polar: Do you handle international payments and taxes?

Yes, Polar acts as merchant of record in 100+ markets, handling payment processing, tax collection, and compliance automatically.

Source
Fortnox: What pricing tiers does Fortnox offer?

Fortnox offers tiered subscription packages that vary by module (accounting, invoicing, payroll) but specific pricing details are not listed on the main website.

Source
Polar: Is there a free tier?

Yes, the Starter plan is free and charges 5% + $0.50 per transaction, ideal for testing and early-stage development.

Source
Fortnox: How can I find Fortnox pricing information?

Detailed pricing is available on the packages page (/paket), through a purchasing guide tool at buy-guide.fortnox.se, or by contacting sales representatives directly.

Source
Polar: Do you offer discounts for startups?

Yes, the Startup Program provides the Scale plan free for 12 months for early-stage AI companies.

Source
Share

Related pages

More on Fortnox

More on Polar

Keep looking

Other head to heads