The best open source accounting software

Do you want to manage your accounts on your own and are you looking for an economical tool to simplify your task? Open source accounting software may be your solution! Freely accessible and largely flexible, they allow you to manage your accounts from A to Z thanks to tailor-made functionalities, as long as you know how to master them.


Here is our selection of the best open source accounting software and all our advice for choosing the one that will suit you best.


A few reminders: open source software

Open source software is characterized by a software source code that is accessible to everyone. We also speak of “free software”. Anyone can read the code, modify it, develop it, share it without any restriction. It is often based on collaborative work through a community of developers and users who share their problems and seek solutions together.


Open source software has several advantages. They are first of all accessible for free, no license is required (often to the detriment of a not very modern design). By using open source software, you also benefit from a great deal of independence, unlike the commitment to a publisher of paid software. Finally, they are very flexible.


You thus obtain a tailor-made open source accounting software.


On the side of the limits, open source software generally does not include assistance or support when getting started or using the code. Apart from forums to exchange with other users, you must manage on your own and therefore master the computer techniques to work on this kind of tool. They also benefit from rather innovative developments but which can take time to see the light of day.


Our selection of the best open source accounting software


Among its many management features, Odoo offers a free Accounting module, accompanied by an invoicing tool (excluding quotes), available online or hosted. From entering to editing account statements, Odoo automates many tasks to save you time. If you need help, you can contact customer service by messaging or consult the many documentations (in English). To find out more, read our review of Odoo.



OpenConcerto is a French open source software which contains a complete and easy-to-use Accounting module, despite its slightly outdated ergonomics. The software can be downloaded and hosted for free on your server or accessed online via a subscription. OpenConcerto then offers paid services (support, maintenance, feature development, etc.). It is suitable for VSEs and SMEs, particularly in the trade or service sectors. To find out more, read our opinion on OpenConcerto.



Noalyss is a Belgian open source software, now compatible with the legal obligations of the French market. It is aimed at the self-employed, as well as at SMEs or associations who want to manage their accounts alone. Its interface could be improved, but remains very easy to learn and use. The strong point of Noalyss open source software is its active community of users and the wealth of documentation to support you in using the software.



Specifically designed for associations (and by an association), Garradin is a 100% online open source accounting software. You therefore have quick, easy and free access to an associative accounting management tool. The handling is done alone, but we appreciate the presence of a chat for your questions and access to past discussions between users and developers to help you find solutions. To learn more, read our opinion on Garradin.


How to choose your open source accounting software?

The size of your business

The choice of your open source accounting software will depend on the size of your business for two reasons:

  • the internal resources must be sufficient to implement, master and manage this type of tool (IT teams, accounting department, etc.) or you must call on an external service provider (chartered accountant, etc.);
  • the volume of activity involves using appropriate accounting software that can deal with a certain amount of data (volume of turnover, number of employees, customers, suppliers, etc.).

Most open source accounting software is free with no restrictions. Others become payable depending on the number of users, storage space or even certain features.


Compatibility with your industry

Some open source accounting software this offer particularly interesting functions for specific sectors of activity: logistics, e-commerce, etc. Depending on your activity, certain functions are essential such as bank synchronization, inventory management or the processing of expense reports.


These depend on your activity: CRM software for merchants, cash register software for restaurateurs, payroll software for service providers, site monitoring software for construction companies, and many more. others.


To choose your open source accounting software, you must therefore ensure that your different tools are compatible and that they work together.


Compliance with accounting and tax standards

Depending on your legal status, you are required to comply with certain accounting and tax obligations. A self-entrepreneur does not have the same accounting obligations as an SME or an association. First of all, you must therefore ensure that the open source accounting software allows you to keep and manage proper accounting according to your obligations.


Software features

As we mentioned, open source software is by nature very flexible. That said, its features must imperatively meet your current and future needs. To find out if open source accounting software is right for you, you must first define your needs and in particular those concerning the following points:

  • chart of accounts;
  • accounting entry;
  • creation and editing of accounting documents;
  • finance management ;
  • procurement management ;
  • invoicing;
  • management of expense reports;
  • VAT management;
  • bank synchronization;
  • export of accounting documents;
  • access to an accountant;
  • integrations.

By comparing these different elements, between your needs and what open source accounting software offers, you will be able to identify the one or those that best meet your needs.


The speed of handling

Using open source accounting software should above all save you time on managing your accounting. Although some remain relatively accessible, others often require programming expertise to get the most out of them. So the more accustomed you are to open source software, the faster and easier you'll get by.


If you do not have computer skills, it is better to turn to another accounting software.


Alternatives to open source accounting software

Non-open source software

If you want to equip yourself with a tool to manage your accounting, you can also choose accounting software from our comparison, not open source.


They bring the same advantages, namely saving time in your accounting management, better efficiency, a reduction in errors and compliance with accounting and tax obligations. The advantage of non-open source software is that it is designed for those of you who are the least comfortable with computer tools, or even with accounting. They are intuitive, well thought out, with modern ergonomics, and above all they generally have a support team.


Among the best known, we recommend QuickBooks, or Axonaut.


There are many accounting software on the market. In particular, you can choose between online software or software to download. Regarding the selection criteria, you can rely on our advice above to make your choice!


Accounting on paper

A bit archaic but authorized method, it is possible to keep your accounts on simple paper. In order not to expose yourself to risks in the event of an inspection, you must however ensure that there are no erasures or blanks. Paper accounting remains tedious, error-prone and therefore not the most optimal way to manage your accounting in our opinion.



Many entrepreneurs are tempted to keep their accounts alone on an Excel-type spreadsheet. However, this method is actually not allowed since it does not comply with certain legal obligations. In Excel, data can indeed be modified or deleted, without keeping track of it.


As a result, this does not comply with the data validation procedure imposed by article 921-3 of the General Accounting Plan.


An online accountant

Last option, you can entrust all or part of your accounting to an online accountant. These service providers offer modern and cost-effective remote accounting management solutions. Reactive and available, they offer their services to all companies, often with collaborative work on dedicated accounting software. Their formulas generally include an all-inclusive monthly subscription or à la carte services.

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