Proprietary operating systems are usually distributed via license or subscription models. Microsoft explicitly describes Windows Enterprise as a per-user or per-device subscription.

Linux systems, by contrast, have no license fees, but they do generate costs for administration, training, and optional commercial support (e.g., Red Hat or SUSE).

“Open source software typically has zero acquisition cost but non-trivial costs for deployment, maintenance and training.”

Proprietary operating systems are closely tied to vendor-specific formats, APIs and cloud ecosystems (e.g., Microsoft 365, OneDrive, Active Directory). This increases the cost and difficulty of switching platforms.

Open-source systems rely on open standards (POSIX, TCP/IP, OpenDocument), allowing organizations to change providers or operate systems in-house.

“Open source reduces lock-in by giving the customer control over the software and its future.”

Vendors such as Microsoft operate large security teams and issue regular patches as part of structured development processes such as the Security Development Lifecycle.

In open-source systems the source code is publicly accessible and auditable. The U.S. National Institute of Standards and Technology (NIST) notes that open-source software, when properly maintained, can be secure and transparently verifiable.

“Many eyes make all bugs shallow.”

Windows and macOS dominate office environments and provide excellent compatibility with standard business software (Office, ERP, CAD).

Linux systems are particularly strong in servers, scientific computing and automation, but desktop usability may require higher IT expertise.

With proprietary operating systems, product life cycles depend entirely on the vendor. If support ends, migration becomes mandatory.

With open-source software, the source code remains available, allowing systems to be maintained or extended by third parties. IBM explicitly describes Linux as strategically stable because it is not controlled by a single vendor.

More than 90% of the world’s most powerful supercomputers (TOP500) run Linux, which is widely interpreted as an indicator of stability and scalability.

In contrast, Windows dominates the traditional desktop and office market, mainly due to its extensive software ecosystem.