ReactOS
Reviews
Star rating
Rank in Operating System
Pros and cons
Pros
- Open Source
- Compatibility
- Lightweight Size
- Hardware Support
- Hardware Compatibility
- Speed/Performance
Cons
- System Crashes
- Driver Issues
- Limited Software
- Slow Updates
- Compatibility Issues
- Hardware Limitations
Traffic & LLM citations
Source: G2 review data
Winning from
Losing to
Key stats
Adoption by company size
| Segment | Share of reviews |
|---|---|
| Small Business | 48.3% |
| Mid-Market | 34.5% |
| Enterprise | 17.2% |
Quarterly history
| Quarter | Reviews | Star rating |
|---|---|---|
| 2024 Q4 | 1 | 3.0 |
| 2025 Q4 | 4 | 4.3 |
| 2026 Q1 | 2 | 4.5 |
| 2026 Q2 | 2 | 5.0 |
Satisfaction ratings
What reviewers say
Open-Source Windows Compatibility in a Lightweight, Familiar Environment
“The best thing about ReactOS is its vision to provide Windows application and driver compatibility while being completely open source. It allows users to explore a familiar Windows-like environment without licensing costs. Its lightweight nature and open codebase make it very use”
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.”
Very easy and easy to access
“Easy to integrate.optimized the cost as it's free to use. Easy implementation”