Square Invoices vs Invoice Ninja
Side-by-side from the Top 11 ranking of The 11 Best Invoicing & Billing Software for Small Business. Last verified June 20, 2026.
The short answer
Square Invoices ranks higher on Top 11 (#6 vs #7) for Small business owners and freelancers sending invoices and tracking payments. The easiest invoicing choice for businesses already using Square for payments.
At a glance
| Square Invoices | Invoice Ninja | |
|---|---|---|
| Top 11 rank | #6 / The 11 Best Invoicing & Billing Software for Small Business | #7 / The 11 Best Invoicing & Billing Software for Small Business |
| Score (out of 9.4) | 8.2 | 8 |
| Best for | Integrated with Square payments | Open-source and self-hosted option |
| Pricing | $ ($0 with processing fees) | $ ($0 to $14/mo) |
| HQ | San Francisco, USA | Remote |
| Founded | 2009 | 2014 |
Square Invoices
The easiest invoicing choice for businesses already using Square for payments.
squareup.com/invoicesSee full entry in The 11 Best Invoicing & Billing Software for Small Business
Invoice Ninja
A powerful, customizable open-source option for those who want to self-host.
www.invoiceninja.comSee full entry in The 11 Best Invoicing & Billing Software for Small Business
Methodology and scoring weights live at /methodology. No vendor pays for placement — see about.