Open source is a type of software that is developed and tested through open collaboration, while proprietary software is a type of software that is owned by an individual or an organization that developed it.
Open source is ease to access, modify, inspect, and redistribute the source code as long as you have a knowledge of the software. Open market source provides flexibility, which allows more and better innovation. At the same time, proprietary has a limited scope that restricts innovation.
Proprietary software is managed by a closed group of individuals that developed it, while open source, as the name implies, is managed by an open community of developers and programmers.
Example of open source software includes Android, Firefox, FreeBSD, Drupal, GNOME, Ubuntu, and so on. Examples of proprietary software include Windows, macOS, iTunes, Google Earth, Abode Flash player, as so on.