Uh, not really. Usually quite the opposite actually. For instance, Linux, the modern land of free/open computing, comes to us from Unix... which was made by Dennis Ritchie and Ken Thompson, two early pioneers of OSs... who worked for Bell Labs, owned by AT&T (and maybe shared with Western Electric? I forget).

Computers back then were far too expensive for them to be anything but reliant on capitalism. It was only with the commoditization of hardware that free and open computing really even became an option.