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What is open-source software? Definition and benefits

Updated: Dec 6, 2023

In today's technological landscape, open-source software has gained a prominent position. These software, built and managed collaboratively with a spirit of sharing, offer a powerful alternative to proprietary solutions. Accessible to all and often free of charge, they allow individuals to use, analyze, modify, and distribute the source code freely according to their specific needs.

With an estimated market value of €25 to €30 billion within the European Union in 2022 (1), open-source is experiencing increasing popularity. Discover how these collaborative software solutions are transforming the technological landscape and offering numerous opportunities.

What is open-source software?

Open-source software is a type of software whose source code is made available to the public, allowing anyone to view, study, modify, and distribute it freely. The central aspect of open-source lies in transparency and collaboration.

The term "open-source" was first introduced in 1998 with the release of the source code for the Netscape Navigator web browser. This initiative, known as the Open Source Initiative (OSI), gave birth to a movement that revolutionized the software industry.

Open-source software is generally distributed under specific licenses such as the GNU General Public License (GPL) or the MIT License, which ensure user rights and promote continuity of openness and freedom.

The growing adoption of open-source software is largely due to its ability to stimulate innovation, offer flexible and customizable solutions, and the power of the developer community that supports it.

Open-source in numbers: a booming market

According to a study conducted by Markess, the open-source market in France is experiencing significant growth, representing nearly €5.9 billion and over 60,000 direct jobs in 2022. This constantly evolving sector is expected to continue expanding, with an average annual growth forecast of 7.8% by 2027. Open-source accounts for approximately 11% of the digital market in France for the year 2022. This highlights the increasing importance of open-source software in the country's digital economy.

What about contributors? According to Github (a web solution that facilitates storage, management, and tracking of source code changes for developers), the European market has over 3 million open-source developer contributors. This strong presence of open-source developers in Europe reflects the commitment and involvement of the European community in promoting and developing open-source software.

Focus on well-known open-source software

This open-source development model has generated some of the most widely used applications and cloud platforms today. Examples include:

  • Linux (operating system)

  • LibreOffice (office suite)

  • Mozilla Firefox (web browser)

  • MySQL (database management system)

  • Git (version control system)

  • Wordpress (content management platform)

  • Android (mobile operating system developed by Google)

Open-source software vs. proprietary software

In the realm of software, choosing between open-source and proprietary software can have a significant impact on how businesses operate and innovate. The table below compares these two types of software:


Logiciel open-source

Logiciel propriétaire


Open and flexible licences

Proprietary licences


Often free or reduced cost

Variable costs, sometimes high


Ability to integrate with other systems

Often specific integration


Open audits and source code transparency

Dependency on the vendor for security updates

Maintenance and support

Community support and discussion forums

Support provided by the vendor, often with maintenance contracts


Wide range of features due to community contribution

Features often determined by the vendor


Open-source code allows for customization

Limited by the customization options provided by the vendor

The choice between open-source software and proprietary software depends on the specific needs of users and businesses. They may opt for proprietary software to benefit from solid technical support and seamless integration, while developers or more technically inclined users may prefer open-source software for its flexibility and transparency. There are also cases where both types of software can be used together.

Advantages of open -source software for businesses

Open-source offers numerous advantages to businesses, enabling them to thrive in a constantly evolving software environment.

Adaptation to Specific Needs

By having access to the source code, businesses can tailor software to their specific needs. They can customize existing features, add new ones, or remove irrelevant ones. This flexibility allows them to optimize software according to their internal processes and enhance efficiency.

Easy Integration into existing Infrastructure

Open-source software is designed to be compatible with different technological infrastructures. Businesses can integrate open-source software with their systems, databases, applications, and existing tools, avoiding compatibility issues and the high costs associated with software migrations.

Reduction of vendor Lock-in

By choosing open-source software, businesses reduce their dependence on specific vendors. They are no longer bound by restrictive license agreements of proprietary software and are not limited by updates or decisions made by a single provider. This independence allows them to maintain greater control over their software infrastructure and avoid risks associated with potential changes in vendor policies or strategies.

Collaboration with the open-source community

Businesses can benefit from the expertise and contribution of a vast community of developers. They can contribute to the improvement of existing software, report issues or bugs, and propose new features. This collaboration promotes innovation and provides access to high-quality technical resources without bearing all the development costs.

Therefore, the adoption of open-source can generate significant benefits, both economically and operationally. These advantages contribute to the rapid evolution of the software industry and the growth of the open-source ecosystem.

Advantages of open-source software for developers

Open-source offers many opportunities and advantages for developers who choose to engage in open-source projects.

Collaboration and mutual learning

Open-source solutions encourage the exchange of knowledge and skills among developers. They can contribute to existing projects, participate in technical discussions, and benefit from the expertise of other developers.

Continuous improvement through the community

Developers have access to the source code, allowing them to contribute to identifying and resolving issues, optimizing performance, and adding new features. Working within a community of passionate developers provides opportunities for improving technical skills and staying updated on the latest development trends and practices.

Skill development and networking

Contributing to open-source projects allows developers to enhance their skills in a practical and concrete environment. They can explore new programming languages, gain experience in specific domains, and expand their project portfolio. Moreover, it enables them to connect with other developers, establish their presence in the community, and expand their professional network.

Open-source attracts an increasing number of passionate developers who want to contribute to meaningful projects, improve their skills, and connect with a dynamic community.

What about security for open-source software?

Open-source software offers a higher level of security due to its accessibility. The open-source nature allows for thorough examination by security experts worldwide, facilitating the rapid detection of vulnerabilities and enhancing confidence in the software's security.

It is important to note that, like any software, open-source software is not exempt from potential risks, including security vulnerabilities. However, thanks to the open nature of open-source projects, the community can respond quickly when a vulnerability is discovered. Collaboration among developers, security experts, and users enables the prompt delivery of fixes and updates, thereby reducing risks for systems and data.

By adopting open-source software, businesses strengthen their resilience and confidence in terms of security. The examination of source code allows them to assess risks accurately and implement appropriate protective measures. This transparency provides them with a better understanding of the security aspects of the software they use, and enables them to act accordingly to ensure the security of their systems and data.

Why choose open-source?

Open-source offers great flexibility to adapt software to the needs of businesses, reduce costs, foster collaboration and contribution, while providing opportunities for skills development. It occupies a central position in today's software industry, with increasing adoption by large enterprises. The open-source movement plays an essential role in technological advancement by encouraging collaboration, stimulating innovation, and shaping the future of technologies.

Choosing open-source represents much more than a simple decision about the type of software to use; it is a strategic approach that enables companies to benefit from a wide range of significant advantages.

(1) Estimation Markess par Exaegis

Illustration image by Freepik


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