Invoice Ninja uses the Elastic License v2, which carries commercial-use restrictions. SolidInvoice's core is MIT licensed: no restrictions, ever. We host it for you from $9/month, less than Invoice Ninja's cheapest hosted tier. The same MIT-licensed core is also free to self-host if you'd rather run your own server.
Invoice Ninja
$10 to $14/mo
$120 to $168/year
SolidInvoice
From $9/mo
Free plan available
Free forever. No credit card required.
Invoice Ninja's hosted plan starts at $10 to $14/month, more than SolidInvoice's hosted plan from $9/month for identical core functionality
The Elastic License v2 is not open source by the OSI definition: it prohibits using the code to offer a competing service and has other commercial restrictions
Invoice Ninja's feature-dense interface can feel overwhelming for users who need clean, simple invoicing
White-labelling and advanced features are locked behind higher-priced hosted tiers
| Plan | Monthly Price | Annual Cost | Your Savings |
|---|---|---|---|
| Invoice Ninja | $10 to $14/mo | $120 to $168/year | N/A |
| SolidInvoice ✓ | From $9/mo | From $90/year | Save $30 to $78/year |
SolidInvoice's core is MIT licensed and open source.
SolidInvoice outperforms Invoice Ninja on 5 of 12 comparisons
| Feature | SolidInvoice | Invoice Ninja |
|---|---|---|
| Professional invoicing | ||
| Online payments (Stripe, PayPal) | ||
| Recurring billing | ||
| Client management | ||
| Multi-currency support | ||
| Self-hosted option (free) | ||
| Open source licenseAdvantage | MIT License | Elastic License v2 |
| REST API access | Pro and up | |
| Simple, focused interfaceAdvantage | ||
| No feature tier gates (self-host)Advantage | ||
| GDPR, EU hosting optionAdvantage | ||
| Starting hosted priceAdvantage | from $9/mo | $10 to $14/mo |
Moving from Invoice Ninja is straightforward. Most users are live on SolidInvoice within hours.
Sign up on the Free plan in 30 seconds. No credit card required.
Add the clients you're currently billing to SolidInvoice. It takes a few minutes. Keep Invoice Ninja in read-only mode for historical records.
Send your first invoice, set up online payments, and you're done.
Professional invoicing, online payments, and recurring billing. Free to start, paid plans from $9 a month.
Free forever. No credit card required.