5 Biggest Open Source Companies in the World

3. Red Hat (Private)

GitHub Contributors By August 2021: 3,334 Active GitHub Contributors

Red Hat is perhaps one of the most well known names in the world when it comes to open source software. Its Linux operating system is the most popular open source operating system in the world and the company has countless projects under its belt. Red Hat was acquired by IBM in 2018 for a whopping price tag of $34 billion making it one of the largest deals in the industry’s history.

Red Hat has more GitHub contributors than its parent company, with 3,334 active and 4,929 total contributors as of August 2021.