Best Invoicing Software 2026 – Top 7 Compared

What to look for when choosing invoicing software in 2026?

Key criteria: KSeF compliance (mandatory from February 2026), debt recovery features, pricing model, ease of use, integrations, and support.

The 7 best options compared

1. Terminovo - Free KSeF invoicing + automated debt recovery at PLN 1/reminder. Best for small and medium B2B companies.

2. Fakturownia - Powerful API, e-commerce integrations. PLN 29–79/month + PLN 30 for debt recovery module. Read full review.

3. InFakt - Simple interface, accountant collaboration. PLN 39–79/month. No debt recovery module. Read full review.

4. wFirma - Full accounting + HR + payroll. PLN 49–149/month + PLN 49 for debt recovery. Read full review.

5. iFirma - Cheapest option at PLN 19/month. No debt recovery features. Read full review.

6. Faktura.pl - Human-led telephone debt recovery from PLN 199/month + commission.

7. Symfonia - Full ERP from PLN 300/month. Overkill for small businesses.

Summary

For most small and medium B2B companies, Terminovo is the best choice: free KSeF, automated debt recovery at PLN 1/reminder, no subscription. See pricing.