Are you a freelancer or proprietor of a small to medium-sized enterprise? If so, you must put a lot of work into your business. Every hour spent on your hard work counts, and no part of a job is so small to go uncompensated. 

Using Excel spreadsheets and Word documents to create invoices can cause a lot of unnecessary frustrations, which is why we review some of the best open-source invoice solutions in this blog. You only need to compare features and choose the best open source invoicing software that suits your business best. 

Let’s begin with the basics:

Why do you need invoicing software?

Invoice software can help businesses gain an instant competitive advantage. With invoice software, businesses can generate invoices by automating the process and sending them directly to their customers via email. 

Automated invoice systems create customized invoices that look professional and streamline the invoicing process, improving the company’s financial health. It helps to prepare invoices with a professional appeal. For example, you can prepare a simple document with your word processor or a spreadsheet or create professional invoices. 

All organizations need an application that can keep track of your payment and reminds you to follow up on the invoices you have already sent, which can be provided by the open source invoicing solution. Below are our picks for the best open source invoicing software.

Top 10 Free and Open Source Invoicing Software and Billing Software

It is important to find the best invoicing and billing software for your business. Check out our recommended top picks:

1. myBillBook

myBillBook is the best software for billing & accounting that provides a secure platform for SMB owners to digitize their day-to-day business transactions like billing, stock management, accounting, receivables/payable management, etc. 

If you’re a business owner, you can download & install it for FREE from Google Playstore & grow your business 2X. This software is available for Android & Desktops in 4 different languages – English, Hindi, Gujarati & Tamil.

Features

• Intuitive dashboard to allow business owners to streamline their operations
• Create customized professional GST & non-GST Bills & share them with your customers via WhatsApp in 3 simple clicks
• Automated payment reminders to help you collect payments faster
• Track inventory on the go
• Multi-user support available
• 100% safe & secure environment. Data stored in best-in-class secure cloud storage
• Provides 24*7 support for queries via chat, call or WhatsApp

Pricing

• Diamond Plan, Platinum, and Enterprise plan with custom pricing

2. Simple Invoices

Simple Invoices is the best open source billing software that supports the recurring generation of sales reports, regular payments, multiple customers and various payment types. Install it yourself if you need to use it or seek help from service providers supported by the developers. 

You can use the software to send invoices, track your finances and bill your clients. Download free invoicing software for Linux, Windows, and IOS.

Features

• Export to various file formats: PDF, MS Word, Excel or just plain text
• Can create multiple invoice types: Itemized invoices and total invoices
• Offers different invoice templates to choose from
• PayPal integration for prompt payment
• Invoice templates and different layouts
• Unlimited invoicing
• Efficient payment tracking
• It can be used in various languages

Pricing

• Free

3. F-Billing

F-billing is an open source billing software for service providers, businesses (small and medium-sized and freelancers. Besides, it has excellent expense tracking and cloud backup. 

Moreover, the software enjoys a simple user interface and easily creates invoices. Furthermore, the software supports multiple users. Download free billing software for small and medium-sized businesses.

Features

• Strong, secure, yet editable products, services, and customers database
• Lets you easily manage your reports and invoices and print sales comments or messages on all the reports
• Supports multi-currency
• Banking Integration
• Expense & Inventory Management
• Invoice Designer

Pricing

• Free Plan
• Solo: $29 (single computer license)
• Pro: $39 (multiple computer license)

4. Sleek Bill

Sleek Bill is the best free open source invoicing software offering top invoicing features that make it the ideal billing tool for freelancers and small businesses. The software is designed to provide the best possible user experience. 

Besides, it lets you generate invoices and other necessary documents in formats of your choice – Excel or PDF. Billing has three plans: a free plan allowing a maximum of 5 invoices per month, a single computer license at $25 (with unlimited invoices) and a pro version giving you multiple computers license at $35.

Features

• Easily create and send estimates to your clients for review
• Add or edit client details from the database
• Automatically backs up your data
• Invoice designer
• The software embeds pre-loaded data for tax (you can customize it to suit your state or country)
• Paypal integration for prompt payments
• Smart reporting

Pricing

• Free forever
• Premium Business: $40 per year

5. Invoice Expert

Invoice Expert is a free, open-source invoicing system package for your business. The software lets you send billing estimates to your client for your approval. The software is user-friendly and can be used within 5 minutes of installation.

Invoice Expert, one of the best open source billing software, helps organizations reduce the time spent on administrative tasks and overall invoice processing time. 

Features

• Create invoice PDFs seamlessly
• Seamless PayPal integration
• The inbuilt data import wizard
• Easily customizable invoice designs
• Detailed reports & Secure cloud-based data backup

Pricing

• Lite Edition: Free
• Advanced Edition: $69.95

6. Invoice Ninja

InvoiceNinja is a powerful software that states invoicing as its primary function but is loaded with various features. However, the number of functionalities it provides is commendable for an open-source invoicing solution. 

With its hefty list of functionalities, InvoiceNinja should be your first preference for open-source invoicing software.

Features

• Integration with 40+ payment gateway options
• Create invoice PDFs in real-time
• Kanban boards for project management
• Google Analytics eCommerce support
• Professional invoice and quotation templates
• Time tracking tools
• Automatic currency conversions

Pricing

• Free plan
• Ninja Pro Plan: $8 per month
• Enterprise Plan: Starting from $12 per month

7. Invoicely

Invoicely is the perfect open source billing system for small businesses. Users can create elegant, professional, and outstanding invoices in under 60 seconds. This software will take you from the estimate to the invoice in a smooth, effortless flow. 

In addition, invoices created through Invoicely will allow payments from customers sitting anywhere in the world and any currency. They can pay directly on the invoice.

Features

• Convenient dashboard with an extensive activity log
• Monthly and yearly financial snapshots
• Send unlimited invoices
• Customize invoices and set up recurring invoice accounts
• Fully customizable statements, icons, and logos for your invoices
• Automatic payment reminders
• Multi-business support
• Track billable hours, expenses and miles

Pricing

• Free Plan
• Basic Plan: $9.99 per month
• Professional Plan: $19.99 per month
• Enterprise Plan: $29.99 per month

8. InvoicePlane

InvoicePlane is a self-hosted, free, open source billing software application for managing your invoices, quotes, clients and payments. Companies built open-source invoicing software to offer a free billing, invoicing, client management and payment tracking application. 

So far, the application has garnered over 12,000 users in over 150 countries. Download open source invoicing software for Windows and Linux operating the software.

Features

• Easily customizable to make sure it fits all your needs
• Multilingual Interface with 23+ languages
• Easy create an invoice with one simple click
• Customer management
• Easily prepare and send quotes to customers with a single click
• Makes it easy to keep track of payments
• Integrates well with Paypal

Pricing

• Free

9. BambooInvoice

If you are an independent contractor, BambooInvoice is one of the best free, open source billing software and online payment providers. What sets it apart is its simplicity to use. In addition, its intuitive interface allows a non-tech-savvy person to access the system easily. 

Furthermore, you can create and edit invoices while keeping track of them by client or invoice numbers you assign. It notifies you about pending invoices. If that isn’t enough, email the invoices from within the application or generate PDFs.

Features

• Available in 11+ languages, including French, English, Dutch, Spanish, German, Romanian, Swedish, Portuguese, Bulgarian, Italian, and Estonian. 
• Extremely user-friendly and actively used software programs
• Built on modern coding standards to keep things functional
• Works with all current and standard compliant web browsers

Pricing

• Free

10. Boxbilling

Boxbilling is another open-source invoicing solution and client management software. It offers tons of pre-designed templates for billing, and it also gives you the option to customize it as per your preferences. The best part is even though it allows you to create an invoice in multiple currencies, you can calculate profits in your money. 

In short, it automates billing, invoicing, and product provisioning. The order automatically gets suspended if the payment is not received by the due date. An Intuitive Web 2.0 AJAX interface gives it a 100% usability score. 

Features

• Multi-currency support
• Enables selling of shared and reseller hosting accounts, software licenses, downloadable products, or any recurrent billing product
• Sends payment reminders 
• Facilitates integrated helpdesk to communicate with clients easily.

Pricing

• Free license

Pro license: $5.95 per month

11. jBilling

The last on our list is jBilling — an open source billing software that gives you full access to the code. In addition, you can customize the code to suit your business needs. Specially designed for small- to medium-level enterprises and agencies, it supports windows and web app platforms. 

Moving on, jBilling gives you full control over how your invoices are calculated and presented, helping you perfect your customer touchpoint. Its template generator feature lets you design every element of your invoices. In addition, you can maintain any number of formats and easily update them from the user interface.

Features

• Facilitate accurate invoicing, customized invoice presentation, and flexible invoice delivery
• Deployable on the cloud platform on-premises basis; designed for enterprise-level grade
• Supports multiple currencies and internationalized language support
• Automated payment collection

Pricing

• Custom Pricing

Bottom Line

Never let any single minute of your hard work go uncompensated. Or waste hours on end of productive time creating an invoice. Learn the art of intelligent delegation. And in this case, the invoicing software can greatly help you.

You must identify the tools and requirements required for your company to pick the best open source invoicing software. Then, your business, clients, partners, and accountants will certainly thank you for the right decision. 

Would you like to know more about invoicing solutions for your business? If you’re looking for more options, see SoftwareSuggest’s in-depth comparison guide