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Head-to-head · Freelance Invoicing Software

Invoice Ninja vs Billdu

  • Updated Oct 2026
  • Both researched from official sources
  • 4 checks side by side
Invoice Ninja #6 in Freelance Invoicing Software 8.3/10 Free plan Free plan✓ 1 of 5 features Visit Invoice Ninja
Billdu #7 in Freelance Invoicing Software 8.3/10 7-day trial Free trial✓ 2 of 5 features Visit Billdu

Invoice Ninja leads on 1 check, Billdu on 1, and 2 are even. Who comes out ahead on the 4 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Lowest starting priceBilldu · $4.99/mo
  • Free planonly Invoice Ninja
  • Free trialonly Billdu
  • Most featuresBilldu · 2 of 5

Invoice Ninja and Billdu score identically on our rubric (8.3 out of 10) for freelance invoicing software; Invoice Ninja sits at #6 and Billdu at #7 in our editorial ranking, so the choice comes down to fit.

Invoice Ninja offers free plan; Billdu doesn't. Billdu is cheaper to start at $4.99/mo against $14/mo.

Invoice Ninja is the better fit for freelancers who want flexible free or self-hosted invoicing. Billdu is the better fit for freelancers needing multilingual invoices and payments.

  • Invoice Ninja fits best

    Freelancers who want flexible free or self-hosted invoicing

  • Billdu fits best

    Freelancers needing multilingual invoices and payments

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature Invoice Ninja 8.3/10 Visit ↗ Billdu 8.3/10 Visit ↗
At a glance
Editor score 8.3 8.3
Ranking #6 in Freelance Invoicing Software #7 in Freelance Invoicing Software
Best for Freelancers who want flexible free or self-hosted invoicing Freelancers needing multilingual invoices and payments
Pricing model Free plan + paid Paid
Starting price $14/user/mo $4.99/mo (best)
Free plan ✓ (best) —
Free trial — 7 days
Deployment Cloud, Desktop, Mobile, Self-hosted Cloud, Mobile
Platforms Web, Windows, macOS, Linux, iOS, Android Web, iOS, Android
Integrations 12 integrations 3 integrations
Features Invoice Ninja 1/5 · Billdu 2/5
Recurring invoices ✓ ✓
Online payments Not checked yet ✓ (best)
Time tracking Not checked yet Not checked yet
Expense tracking Not checked yet Not checked yet
Client portal Not checked yet Not checked yet
Specs
Mobile apps Not checked yet Not checked yet
Our review
Pros
  • Free plan includes recurring invoices, auto-billing, and online payment gateways
  • Pro adds unlimited clients and invoices, reminders, reports, and REST API access
  • Hosted apps, self-hosting, and integrations including Stripe, PayPal, and Zapier
  • Lite includes unlimited invoices and expense tracking.
  • Invoices support multiple currencies and languages.
  • Stripe, PayPal and Xero integrations connect payments and accounting.
Cons
  • Free plan is limited to 5 clients
  • Advanced functions such as bank sync and PEPPOL access require Enterprise
  • Many options across hosted and self-hosted editions may take time to evaluate
  • Lite is limited to 10 clients.
  • Recurring invoices and API access require Premium.
  • There is no free plan; the trial lasts 7 days.
Our verdict

Invoice Ninja is invoicing and payment software for freelancers, contractors, consultants, agencies, and small businesses. It covers creating and sending invoices and quotes, collecting online payments through connected gateways, recurring…

Read the review →

Billdu is invoicing software for freelancers, contractors and small businesses that need to create and send invoices, track expenses and accept online payments. Its web app and iOS and Android apps support work across devices, while…

Read the review →
  1. Invoice NinjaFreelance Invoicing Software 8.3Free plan
  2. BillduFreelance Invoicing Software 8.37-day trial

Strengths and trade-offs

  • Invoice Ninja — where it wins

    • Free plan includes recurring invoices, auto-billing, and online payment gateways
    • Pro adds unlimited clients and invoices, reminders, reports, and REST API access
    • Hosted apps, self-hosting, and integrations including Stripe, PayPal, and Zapier

    Where it doesn't

    • Free plan is limited to 5 clients
    • Advanced functions such as bank sync and PEPPOL access require Enterprise
    • Many options across hosted and self-hosted editions may take time to evaluate

  • Billdu — where it wins

    • Lite includes unlimited invoices and expense tracking.
    • Invoices support multiple currencies and languages.
    • Stripe, PayPal and Xero integrations connect payments and accounting.

    Where it doesn't

    • Lite is limited to 10 clients.
    • Recurring invoices and API access require Premium.
    • There is no free plan; the trial lasts 7 days.

More comparisons

All freelance invoicing software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update