FastBill vs Fortnox: Complete Comparison (2026)
An in-depth comparison of FastBill and Fortnox to help you choose the right tool for your business.
Last updated: November 2026
FastBill
5.2/10
Cloud invoicing and bookkeeping software from Frankfurt for German freelancers and small businesses, with e-invoicing, DATEV export and direct VAT filing.
Fortnox
6.5/10
Swedish cloud accounting platform covering bookkeeping, invoicing, payroll, supplier invoice approval and reporting for small and mid-sized Swedish businesses and accounting firms.
Feature-by-Feature Comparison
| Feature | | |
|---|---|---|
| Scores | ||
| Overall Rating | 5.2/10 | 6.5/10 |
| Scalability | 3/10 | 6/10 |
| Analytics | 4/10 | 5/10 |
| Compliance | 7/10 | 7/10 |
| Integration | 5/10 | 8/10 |
| Security | 5/10 | 6/10 |
| Support | 4/10 | 7/10 |
| Cost | 5/10 | 6/10 |
| Customization | 6/10 | 5/10 |
| Ease of Use | 6/10 | 7/10 |
| Pricing | ||
| Free plan | No | No |
| Cheapest paid plan | €10/mo Solo | SEK 238/mo Mini |
| Estimated cost for 10 users | €10/mo Solo | SEK 238/mo Mini |
| Features | ||
| Payroll | ||
| Accountant Access | ||
| Expense Management | ||
| Invoicing | ||
| Accounts Payable | Not listed | |
| Bank Reconciliation | Not listed | |
| Corporate Cards | Not listed | |
| Financial Reporting | Not listed | |
| General Ledger | Not listed | |
| Multi-currency | Not listed | |
| Online Payments | Not listed | |
| Tax Compliance | Not listed | |
FastBill vs Fortnox cost by team size
| Team size | FastBill | Fortnox |
|---|---|---|
| 1 user | €10/moSolo | SEK 238/moMini |
| 5 users | €59/moPremium | SEK 238/moMini |
| 10 users | €10/moSolo | SEK 238/moMini |
| 25 users | €10/moSolo | SEK 238/moMini |
| 50 users | €10/moSolo | SEK 238/moMini |
The plan that fits each team size, billed monthly, before add-ons and usage charges. Each cost opens that tool's pricing calculator for the team size.
Which One Should You Choose?
Why choose FastBill
- Higher Customization score (6/10 vs 5/10)
Why choose Fortnox
- Higher Scalability score (6/10 vs 3/10)
- Higher Integration score (8/10 vs 5/10)
- Better fit for accountants and bookkeepers (9/10 vs 5/10)
- Better fit for enterprise (3/10 vs 1/10)
- Includes Payroll, which FastBill lacks
Pros & Cons
FastBill
Pros
- Experte.de rated invoicing 1.3, its strongest area, covering quotes, recurring invoices, time tracking and XRechnung.
- XRechnung and ZUGFeRD e-invoicing are included in every plan.
- VAT pre-returns go straight to the tax office through ELSTER.
- DATEV export and tax advisor access make handing over to a Steuerberater simple.
- Invoices can carry payment links through PayPal, Stripe or Sofort.
Cons
- FastBill cannot produce an EÜR or P&L on its own; tests say these need an external tax advisor.
- There is no cash book, and fuer-gruender.de says there is no payroll interface either.
- Automatic dunning and extra receipts cost extra, and automatic bank matching needs Premium.
- Support is by message or email only, on weekdays, with no phone line or live chat.
- Reviewers describe the interface as dated.
Fortnox
Pros
- More than 500 integrations, and one 189 kr licence covers all of them.
- A single platform covers bookkeeping, invoicing, payroll, supplier invoice approval, payments and a company card, which suits Swedish SMEs.
- Accounting firms get a dedicated bureau package for working in their clients' books.
- New companies get six months free, and every new subscription has a 30-day open purchase period.
- Trustpilot and Shopify app reviewers frequently praise customer service and sync reliability.
Cons
- Usage fees for invoices, paid employees and interpretations, plus an Access fee that scales with activity, make total cost hard to predict.
- Three-month agreements cost 15 percent more than the 12-month list prices.
- The product is Swedish-focused, and users have asked for an English interface.
- Some users call the reporting tools dated and say neobank integrations such as Revolut are missing.
Not sold on either?
Frequently Asked Questions
Fortnox scores higher on our Finance Software criteria: 6.5/10 against 5.2/10 for FastBill. The largest gap is in Integration: 5/10 for FastBill and 8/10 for Fortnox.
No, neither FastBill nor Fortnox lists a free plan.
Fortnox is the better fit for accountants and bookkeepers: we rate it 9/10 for them, against 5/10 for FastBill.
Fortnox has Payroll, which FastBill lacks.
