Alternatives to Invoice Ninja

2 existing options to compare before committing to a custom build.

• DolibarrOpen source

  Open-source ERP and CRM of French origin (GPL-3.0): quotes, invoices, customers, products and stock, self-hosted.

• SolidInvoiceOpen source

  Open-source invoicing and quotes (MIT) for small businesses; compliance with French invoicing rules remains to be checked.

Every link is checked (active project under a free licence, free plan verified on the vendor’s website, live site). No alternative is sponsored.