Open-source business application suite developed in Python, offering ERP, CRM, e-commerce, and project management, reducing software needs and synchronization costs with over 260 core modules.
Belgium
EU




Apps similar to Invoice include Odoo, which is open source with a free version. Other options are ERPNext, Invoice Ninja, Invoice Swift and Manager. Invoicing Software like Invoice are a crowded field, with more than 50 alternatives for the web, Mac, Windows, iPhone and iPad.
Open-source business application suite developed in Python, offering ERP, CRM, e-commerce, and project management, reducing software needs and synchronization costs with over 260 core modules.




ERPNext is a free and open-source integrated Enterprise Resource Planning (ERP) software developed by Frappé Technologies Pvt. Ltd. and is built on MariaDB database system using a Python based server-side framework.




Free, open-source invoicing and billing platform providing PDF invoice generation, client payment options through 30+ gateways, multiple templates, company logo addition, team roles, time tracking, advanced customization through paid plans, and no installation required.




Turn your phone into a professional billing machine. Invoice Swift is the offline-first invoice maker designed for freelancers, contractors, and small business owners who need to get paid fast.



Manager is free accounting software for Windows, Mac and Linux.
It features an intuitive and innovative user interface with modules such as cashbook, invoicing, receivables, payables, taxes and comprehensive financial reports.
The desktop edition is free while the cloud edition.



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.



From invoicing to expense tracking to accounting, Akaunting has all the tools you need to manage your money online, for free.




Comprehensive cloud accounting for small businesses and freelancers; save time billing clients by sending, tracking, and collecting payments swiftly. Generate professional invoices, manage expenses effortlessly, track project time seamlessly, and prepare for tax with ease.




Tryton is a three-tiers high-level general purpose application platform under the license GPL-3 written in Python and uses PostgreSQL as database engine.
