Businesses that take advantage of the best open source invoicing and billing software have recorded significant growth. That is why, as of today, about 69.4% of small and medium-sized enterprises (SMEs) are using one or more invoicing and billing software to facilitate the day-to-day running of their company.

An open-source invoicing and billing software for Windows, Mac, Linux, Android, etc. helps businesses to request payment from a smartphone or computer formally. These digital tools save businesses from manually sending and receiving payments, which ensures payment is accurately recorded. For this reason, they can help with the financial management of your company.

The best open source invoicing and billing software for businesses today is:

1. BoxBilling:

BoxBilling is a free, open-source invoicing and billing software that was released in 2011. It is suitable for selling products such as software licenses, domains, shared and reseller hosting accounts, and downloadable products. BoxBilling has been integrated with PayPal, Alipay, Payza, WebMoney, and other payment processors to facilitate the efficient receipt of payments from customers. Support has been provided for devices running on Windows, Mac, Android, and iOS.

2. FreshBooks:

FreshBooks can be used to create invoices instantly and receive payments from customers. This open-source accounting software can also create invoices and organize expenses automatically, on your behalf if a set of conditions is true. Hence, you can save time by automating your business processes using this tool. FreshBooks relies on Cloud infrastructure, and as such, it can be accessed from smartphones, tablets, and computers irrespective of their OS.

3. InvoicePlane:

InvoicePlane is an open-source invoicing application that was launched in 2014. The software is suitable for small, medium, and large businesses looking to send invoices to customers and facilitate swift mobile and online payments. To that effect, this professional tool supports devices running on Windows, Mac, Linux, Android, and iOS. There's also a web-based interface to facilitate receiving payments from your customers with ease.

4. InvoiceNinja:

InvoiceNinja can be used to create invoices and receive payments in real-time. In the case of the latter, support has been provided for 40 payment gateways, including Stripe, PayPal, WePay,, and It, therefore, opens a range of options for you to receive deposits, partial payments, recurring payments, etc. from clients. Over and above that, InvoiceNinja is compatible with Windows, Mac, Linux Android, iPhone/iPad, and web-based devices

5. CitrusDB:

CitrusDB is open-source customer service and billing software that has been designed for service providers, including internet service, subscriptions, consulting, and telecommunications. It can be used to create the billing cycle needed, such as one-time, monthly, bi-monthly, quarterly, etc. However, supports only provided for computers running on the Windows and Linux/Unix OS. You can also run the software from a web-based application.

6. BambooInvoice:

Small businesses and independent contractors can use dedicated software for invoicing and billing such as BambooInvoice. This software allows you to create customizable invoices, recurring/subscription billing, and receive online payments from clients. BambooInvoice supports Windows, Mac, Linux, and web-based devices; hence, you can choose the most convenient platform to access its easy to use interface.

7. LogicInvoice:

LogicInvoice makes keeping track of invoices, generating recurring invoices, and billing your customers easier. You can receive online payments directly using this software since it has been integrated with payment gateways. It's also worth noting that this software supports multiple languages and currencies; thus, there is a range of options to settle for. LogicInvoice supports Windows and web-based devices.

8. jBilling:

jBilling is another invoice management software that also offers a billing solution. For invoicing, it boasts of handling complex invoicing seamlessly, while billing is made possible using payment gateway plug-ins. You can set up hourly or recurring billing directly from the jBilling software that has offered support for Windows and web-based platforms.

9. Siwapp:

Siwapp is a free online invoicing and billing software that helps you to manage your business's invoicing and billing anywhere. To that effect, it handles mobile payments, contingency billing, hourly payments, amongst others. There's the option to generate invoices periodically and obtain the PDF versions of invoices you've created for your customers. This software is compatible with Windows, UNIX/Linux, and web-based platforms.

10. Zoho Books:

Thousands of businesses around the world have come to rely on Zoho Books, a GST-ready online accounting software. This tool allows you to send invoices, raise sales orders, generate reports, reconcile bank transactions, track inventory, and other financial operations in your business. Zoho Books is available as a mobile application; therefore, you can manage your business while on the go.


The aim of running a business is to make a profit, and that can be made possible by using the best open source invoicing and billing software. These professional tools will ensure that your businesses' invoicing and billing process is handled efficiently; hence, you can minimize missed or late payments.