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ReactOS Foundation

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29 reviews
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4.1
Serving customers since
2002
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ReactOS

29 reviews

ReactOS is a free and open-source operating system designed to be compatible with Windows applications and drivers. It aims to provide a familiar user experience by replicating the look and feel of Windows, enabling users to run their favorite Windows software in an open-source environment. ReactOS is developed from scratch, ensuring that it is not a derivative of Linux, but a standalone system with its own architecture. Key Features and Functionality: - Windows Compatibility: ReactOS is capable of running a wide range of Windows applications and drivers, offering users the flexibility to use software they are accustomed to. - Familiar Interface: The operating system mirrors the appearance and functionality of Windows, reducing the learning curve for new users. - Open Source: Being open-source, ReactOS allows users and developers to view, modify, and distribute its source code, fostering a collaborative development environment. - Active Community: The project is supported by a global community, providing opportunities for collaboration, skill enhancement, and contribution to the development of the operating system. Primary Value and User Solutions: ReactOS addresses the need for a free and open-source operating system that maintains compatibility with Windows software and drivers. This is particularly beneficial for users and organizations seeking an alternative to proprietary systems without sacrificing the ability to run essential Windows applications. Additionally, ReactOS serves as an educational platform for those interested in learning about operating system development and Windows internals, offering practical experience in a real-world project.

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ReactOS Foundation Reviews

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Verified User in Accounting
AA
Verified User in Accounting
10/28/2025
Validated Reviewer
Review source: Organic

Revives Legacy Applications with Ease

I appreciate ReactOS for its valuable role in providing real-world learning tools for developers interested in understanding the Windows kernel. For six months, I have found it particularly helpful in running older applications and for evaluation and testing purposes. I love its capability to use FAT16 or 32 for boot partitions, which aligns well with my testing needs. Moreover, ReactOS bridges the gap by running older applications that aren't backward compatible with other operating systems, which includes my usage of DOSBox. The performance of these applications on ReactOS impresses me, running smoother compared to other platforms. ReactOS is not hardware intensive, which is beneficial as it extends the life of aging systems and repurposes outdated hardware. I like the familiar Windows interface which makes it user-friendly and less intimidating. Additionally, the fast boot process is a feature I find appealing too. The straightforward setup and the ability for quick installation further enhance its user-friendly nature, making the experience pleasant and efficient overall.
andré P.
AP
andré P.
Web Developer @ Érre Boost - Érre Technology - Grupo Érre
10/12/2025
Validated Reviewer
Verified Current User
Review source: G2 invite
Incentivized Review

Promising Open-Source Alternative to Windows

I like that ReactOS aims to provide full compatibility with Windows applications while being completely open source. It’s lightweight, fast to boot, and works surprisingly well on older hardware.
Verified User in Financial Services
UF
Verified User in Financial Services
10/17/2024
Validated Reviewer
Verified Current User
Review source: G2 invite
Incentivized Review

Promising

Free, open-source Windows compatible alternative.

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HQ Location:
Amsterdam, North Holland

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@reactos

What is ReactOS Foundation?

ReactOS Foundation is an organization dedicated to the development and promotion of ReactOS, an open-source operating system designed to be compatible with Microsoft Windows applications and drivers. The foundation supports the ReactOS community by providing resources, organizing development efforts, and fostering collaboration among developers and volunteers. Its goal is to create a free and open-source alternative to Windows, allowing users to run Windows software without relying on a proprietary operating system.

Details

Year Founded
2002
Website
reactos.org