Invoice Ninja — #2 Alternative to QuickBooks / Xero
Open-core invoicing, expense tracking, client portal, and time-billing platform
Invoice Ninja streamlines recurring invoices, quotes, purchase orders, vendor expenses, and 40+ payment gateways (Stripe, ACH, PayPal, Mollie) with a branded client portal you can self-host via Docker.
License: Elastic-2.0 / Source-Available · Pricing: Open Core · Compare all QuickBooks / Xero alternatives · Official Website