Can I open-source Invoice Ninja?
YES · mature open-source replacementYes. ERPNext (38k stars), Invoice Ninja (9k stars), Kimai (4k stars) are mature open-source replacements for Invoice Ninja — self-host with real ops work and stop paying $14/mo.
They pay because billing software is boring and should not break on invoice day.
xmanaged hosting
xupgrades
xbackups
xsupport
xpayment setup convenience
xreduced ops risk
These projects already replace it, free.
EERPNextQuotes, invoices, payments, expenses and a portal inside a much larger ERP than anyone ordered.open source↗IInvoiceShelfInvoices, estimates, expenses, payments and a client portal; the bill arrives as Docker maintenance instead.open source↗IInvoice NinjaInvoicing, quotes, expenses, and time tracking for freelancers who'd rather not pay monthly.open source↗What each one is, in full: ERPNext · Invoice Ninja
all 4 open-source alternatives to Invoice Ninja →· no votes, no pay-to-list · just what's real
Invoice Ninja pricing
| plan | monthly | annual (per mo) | what you get |
|---|---|---|---|
| free | $0/workspace | $0/workspace | Up to 5 clients, unlimited invoices and 4 invoice templates. |
| ninja pro | $14/workspace | $11.67/workspace | Unlimited clients/invoices, 11 templates and up to 10 interlinked companies per login. |
| enterprise | $18/workspace | $15/workspace | 1–2 users at the starting price; scales to 51–100 users at $300/month or $250/month annual equivalent; 250 PEPPOL credits included. |
| premium business | — | $23.33/workspace | Up to 100 users plus migration, custom reports and developer concierge. |
free tier5 clients, unlimited invoices and 4 invoice templates.
billingmonthly + annual (2 months free); annual charged as one yearly payment; 30-day money-back promise
hidden costsPayment-gateway processing fees are separate. Enterprise prices rise with user count, from $18/month for 1–2 users to $300/month for 51–100; only 250 PEPPOL credits are included and extra-credit pricing was not public.
verified 2026-08-11 · source ↗
Is Invoice Ninja free?
The free plan covers up to 5 clients with unlimited invoicing. Paid is Pro at $14/mo (checked 2026-08-07).
Can I open-source Invoice Ninja?
Yes. ERPNext replaces Invoice Ninja today — self-host it on your own server or machine with no subscription. The full list of open-source alternatives is on this page.
How much does Invoice Ninja cost?
Invoice Ninja costs about $14/month (Pro, checked 2026-08-07), which is $168 per year. That's what you save by replacing it with open source.
What do I lose by replacing Invoice Ninja?
Honestly: managed hosting; upgrades; backups; support; payment setup convenience; reduced ops risk. If any of those are load-bearing for you, keep paying.
Is there an open-source alternative to Invoice Ninja?
Yes: ERPNext (Quotes, invoices, payments, expenses and a portal inside a much larger ERP than anyone ordered.) InvoiceShelf (Invoices, estimates, expenses, payments and a client portal; the bill arrives as Docker maintenance instead.) Invoice Ninja (Invoicing, quotes, expenses, and time tracking for freelancers who'd rather not pay monthly.) All 4 curated open-source alternatives are at caniopensourceit.online/invoice-ninja/alternatives.