The primary advantage of using open-source software is its collaborative development model. This allows developers from around the world to contribute to the codebase, resulting in faster innovation and a more robust product. Additionally, users can modify and customize the software to meet specific needs without facing licensing restrictions. This fosters a community-driven support system, enhancing security and ensuring that updates are more frequent and transparent. Overall, open-source software can be more cost-effective and adaptable than proprietary alternatives.