Red Hat is the company most often cited as proof that a business can be built on free, open source software. Its own about page states that the company was “Founded in 1993” on the belief “that open collaboration is the best way to create software,” and that it began “by transforming operating systems with Red Hat Enterprise Linux.” Today Red Hat says its platforms are “trusted by 90% of Fortune 500 companies.”
The puzzle Red Hat had to solve was simple to state and hard to answer: if the software is freely available and can be copied and redistributed by anyone, what does the customer pay for? Red Hat’s answer was to sell not the bits but the assurance around them. Rather than charge a per-copy license fee, it built a subscription business around Red Hat Enterprise Linux (RHEL), bundling tested and certified releases, security updates over a long support window, and enterprise support and services. The code stayed open; the relationship and the reliability were the product.
That model was laid out publicly when Red Hat filed to go public. Its S-1 registration statement, filed with the U.S. Securities and Exchange Commission on June 4, 1999 (CIK 0001087423, file number 333-80051), described a business built around open source software and the services and subscriptions sold on top of it, and stated that the company applied to trade on the Nasdaq National Market under the symbol “RHAT.” The filing also candidly described the risks unique to this model, including reliance on software the company did not exclusively own and on the broader open source community.
Red Hat Enterprise Linux became the company’s anchor product and one of the most widely deployed commercial Linux distributions in the enterprise. Around it Red Hat assembled a portfolio that grew over the years to include middleware, virtualization, automation, and, after its 2012 acquisition of the company behind it, the OpenShift Kubernetes platform. The common thread was the same: take open source projects, harden and support them, and sell the result as a subscription.
In 2019 Red Hat itself became part of a much larger company. Its about page notes that Red Hat “joined with IBM since 2019,” a deal IBM valued at roughly thirty-four billion dollars, making it one of the largest software acquisitions in history and a striking endorsement of the idea that open source had become core enterprise infrastructure.
Red Hat’s significance in the history of software is less about any single product than about the precedent it set. It demonstrated, at scale and in public financial filings, that giving the source code away and charging for everything around it could be a durable, profitable business, and it gave later open source companies a template to argue from.