Invoice Ninja

Invoice Ninja is a free open-source online invoice software that allows the creation of invoices in real-time, creation of tasks, projects, and tracking time, customization of invoices with personal logos, and creation of recurring and auto-bill invoices. Invoice Ninja supports more than forty payment options and provides professional invoice designs as well as an item and product library system.

Invoice Ninja is designed for freelancers and businesses that offers tools for invoicing and payments, expense and vendors, proposals creation, and time-tracking projects and Kanban. The multiple company support feature enables managing invoicing from multiple businesses all under one Invoice Ninja account. Invoice Ninja allows creating recurring invoices and auto-billing clients to save time by automatically billing long-term clients with recurring invoices. The proposal creation tool offers an excellent platform for creating and sending beautiful proposals to customers. Invoice Ninja allows attaching 3rd party files to invoices and expenses.

Through this, businesses and users can combine important files within their invoice document, all in one email delivery. The invoicing software allows creating project tasks and tracking time by supporting logging every task, recording every second, and then click to add the data to the invoice. The client-side portal and invoice history feature offers an excellent platform to allow clients see all their transactions at a glance. Invoice Ninja converts quotes to invoices for payments with just a click of a button. Invoice Ninja allows customizing email subjects and body texts by tailoring the invoice email text for improved open rates and brand recognition. Invoice Ninja also allows requesting partial payments using the same invoice again and again.