Invoice Ninja is a feature-rich invoicing and billing platform built for freelancers, agencies, and small businesses. It offers a flexible way to create, send, and manage professional invoices while also supporting recurring billing, time tracking, and expense management.

Users can easily customize invoices with branding, accept online payments, and automate reminders for overdue bills. Invoice Ninja is available in both free and paid versions, with the free plan allowing up to 100 clients and unlimited invoices.

For businesses seeking more, the paid versions offer advanced automation, custom domains, and integrations with over 40 payment gateways.