Billdu review

Billdu is the cheapest way in this list for a European freelancer to meet a national e-invoicing rule. Its e-invoicing page lists six systems built into the app: Verifactu records sent to Spain's AEAT with QR verification, Peppol BIS Billing 3.0 through a certified Access Point for Belgium, FatturaPA XML through Italy's SdI, Factur-X through a certified PDP for France, XRechnung and ZUGFeRD for Germany, and FA(3) invoices through Poland's KSeF. That is broader clearance coverage than Invoice Ninja, which reaches Poland only through Peppol. Plans start at $4.99 per month billed annually for Lite, which allows 10 clients, with Standard at $9.99 for 50 clients and Premium at $19.99 for unlimited clients, 10 team members and API access. There is a 7-day free trial and no permanent free plan. The main gap is that the pricing page does not say which plans include each e-invoicing system, and Billdu lists nothing for ZATCA or other Gulf mandates, so confirm your country is on your plan.

Who it is for

freelancers in Spain, Italy, France, Germany, Belgium or Poland

Price

From $4.99 per month billed annually ($7.99 billed monthly); 7-day free trial.

Lite $7.99 Monthly $4.99 Monthly
Quoted from the vendor pricing page on November 11, 2026.

Key features

• Verifactu records sent to Spain's AEAT with QR verification
• Peppol BIS Billing 3.0 invoices through a certified Access Point for Belgium
• FatturaPA XML through Italy's SdI and Factur-X through a certified PDP in France
• XRechnung and ZUGFeRD invoices for Germany
• FA(3) e-invoices through Poland's KSeF

Strengths and weaknesses

• Strength: Cheapest published price in this list at $4.99 per month billed annually
• Strength: Covers clearance systems such as KSeF and SdI, not only Peppol
• Strength: Built for freelancers and micro-businesses with mobile apps
• Weakness: Pricing page does not state which plans include e-invoicing
• Weakness: Lite plan is limited to 10 clients
• Weakness: No ZATCA or Gulf mandate support listed

Key facts

• Systems: Verifactu, Peppol, SdI, Factur-X, XRechnung, KSeF
• Cheapest plan: Lite, 10 clients
• Free trial: 7 days
• Team plan: Premium, 10 team members

Where it ranks

Billdu is No. 6 in our Best E-Invoicing Software verdict.