Finance and accounting decision
Invoice Ninja
A single developer can build a useful, self-hosted invoicing workflow (invoices, PDF, Stripe payments, email) in about a week, but matching Invoice Ninja's full feature set (bank sync, e-invoicing/PEPPOL, native apps, integrations catalogue, enterprise features) is larger and not practical to fully replicate.
Visit website↗Open-source builds that already do this
Every project below is open source and already does this job today. Fork one, self-host it, or take the parts you need — the build prompt further down assumes an empty file, and this is the shortcut past that. Licences differ; check the one on each card before you ship.
Code Invoice Ninja publishes itself
Not a way out of the subscription — these are the vendor’s own repositories. Worth a look for how they build, and for anything you would have to integrate with.
What a replacement has to do
- Create and send invoices, accept online payments, record payments and view invoice status
What it still won’t have
- Bank account sync (Yodlee / GoCardless)
- e-Invoicing / PEPPOL network access
- Branded client portals and hosted subdomains
- Mobile & desktop native apps
- Built-in integrations catalogue (Zapier/Make) and many prebuilt connectors
What remains hard
- Brand trust
Trusted by 200,000+ businesses · Free forever · No credit card
First-year cost
Keep paying
Paying is—cheaper in year one.
On cash alone, building overtakes the subscription at 1 seat.
Money you would actually spend
Time you would spend
—
What you would spend
What we assumed
The verdict above measures whether you could build it. This one is only about money.
Runnable build prompt
Build a minimal self-hosted invoicing app using Django + React + Postgres. In scope: user account, client CRUD, product/service library, invoice CRUD with real-time HTML preview and PDF generation, email invoices via SMTP, Stripe checkout link integration and webhook handlers to record payments, simple dashboard showing outstanding/paid invoices, and a REST API for invoices. Out of scope: bank sync (Yodlee), PEPPOL/e-invoicing, native mobile apps, extensive marketplace integrations, and multi-tenant enterprise user permissions. Include input validation, error handling, webhook signature verification, unit tests for core business logic, and basic end-to-end tests for invoice creation and payment flow. Provide Docker Compose for local dev and a systemd-deployable production setup with instructions for TLS, database migrations, and backups.
How we checked
How the score was reached
- Partly verdict base52
- An open-source build was found+5
- 5 cited sources+3
- Price verified on pricing page+3
- 3/3 assessment runs agreed+4
- Evidence score67
The base comes from the verdict. Everything under it is a check that either happened or did not, and each one is a fact frozen in this record rather than a judgement made at render time — so the same evidence always produces the same number.
How scoring works →Cited sources · 5
Every page the run actually retrieved.
- official productInvoice Ninja — product
- official pricingInvoice Ninja — pricing
- official docsInvoice Ninja — features
- open sourceakaunting/akaunting
- open sourceDolibarr/dolibarr
Integrity checks
What held up, and what did not.
