Open Source Invoice Ninja AlternativesTime Tracking Tools & Invoicing Software like Invoice Ninja
The best open source alternative to Invoice Ninja is Midday. It's not free, so if you're looking for a free alternative, you could try Summit Finance or Cattr. If that doesn't suit you, our users have ranked more than 100 alternatives to Invoice Ninja and 14 is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Invoice Ninja are InvoicePlane, Akaunting, SmoothLedger and InvoiceShelf.
Alternatives list
Summit is a modern, self-hostable invoicing and financial management application designed for freelancers, small businesses, and agencies. Create professional invoices, track expenses, generate financial reports, and more.

- 274 Cattr alternatives
Cattr is a free open-source self-hosted time tracker with desktop clients for windows, mac, linux. The key features are built-in screenshot capture, activity detection.
Cost / License
- Free
- Open Source
Application type
Platforms
- Mac
- Windows
- Linux
- Online
- Self-Hosted


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InvoicePlane is a self-hosted open source application for managing your quotes, invoices, clients and payments. The application comes with various options, templates and settings to customize your invoicing experience.



InvoicePlane vs Invoice Ninja Comments


- InvoicePlane is Free and Open Source
- InvoicePlane is Privacy focused
- 125 Akaunting alternatives
From invoicing to expense tracking to accounting, Akaunting has all the tools you need to manage your money online, for free.
Cost / License
- Freemium
- Open Source
Application type
Platforms
- Mac
- Windows
- Linux
- Online
- Self-Hosted


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Free, privacy-focused financial tools for freelancers: Invoice, Payslip, and Quotation generators with no sign-up required.



InvoiceShelf is an open-source web & mobile app that helps you track expenses, payments & create professional invoices & estimates.


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OpenSourceBilling is a simple web application to create and send invoices, receive payments, manage clients and companies. It generates reports of Item sales, payments, and collected revenues. It supports multi languages and multi currencies.
Cost / License
- Free
- Open Source (GPL-3.0)
Platforms
- Linux
- Self-Hosted


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Clean UI, same or more features. Also easily hackable/customizable!