Myth 1: Open source is less secure than proprietary software In short, licensing models have nothing to do with security. If anything, OSS allows for development teams to rapidly address any security issues, whereas proprietary systems must rely on the software vendor to get around to issuing an update or patch.
Additionally, open source projects benefit greatly from having a diverse community that is interested in the development of the solution, not just one vendor. This allows for things like peer review from a base of knowledgeable and expert supporters. This really can’t be undervalued, because while these communities are invested in the quality of the software, they aren’t necessarily invested in making a buck from every functional improvement.
In the end, if you asked a group of people to use the same processes to produce a proprietary model and OSS model of their software, they would likely be just as secure, and just as functional.