Why Is Linux Free? How Open-Source Software Gets Funded

The natural question

Linux is free, and so is a vast amount of other open-source software you rely on every day. This naturally raises a puzzle: if it's free, who builds it, maintains it, and pays for all that work? Software development is expensive and time-consuming, so how does free software get made and sustained, often to a very high quality? The answer reveals the surprising and clever economics of open source, which turn out to be more robust than 'nobody gets paid.' Understanding how free software is actually funded explains why so much of the digital world runs on software that costs nothing to use.

Companies pay developers

A huge, often-surprising source of open-source funding is companies paying their own employees to work on it. Why would a company pay people to build software it gives away? Because those companies depend on that software and benefit from improving it. Many businesses rely on Linux and open-source tools to run their products and infrastructure, so they employ developers to maintain and enhance the software they need, sharing the work (and cost) with everyone else who uses it. A large share of contributions to major open-source projects, including Linux itself, comes from paid corporate employees, not just volunteers.

Why companies collaborate

This corporate involvement makes business sense through shared development. Rather than each company building its own version of essential infrastructure software (a huge, redundant expense), many companies collaborate on shared open-source projects, splitting the cost and effort while all benefiting from the result. It's more efficient for everyone to jointly maintain the foundational tools they all depend on. This is why fierce competitors often cooperate on open-source projects: the underlying software is a shared foundation, not a competitive advantage, so pooling resources to build it well benefits all of them. Open source becomes a shared commons that lowers costs industry-wide.

Volunteers, foundations, and donations

Beyond corporate contributors, open source is also sustained by dedicated volunteers who contribute their time and skill (out of passion, to build their reputation, to scratch their own itch, or to give back), non-profit foundations that steward major projects and coordinate development, and donations and sponsorships from users and companies who value the software. Some projects run on grants. This mix of volunteers, foundations, and community support, alongside corporate contributions, forms a diverse funding ecosystem. For large, important projects, this combination often produces well-maintained, high-quality software, even without anyone selling it.

Business models around free software

There are also viable businesses built around free software. Companies offer paid support, services, hosting, training, and enterprise features around open-source cores, businesses happily pay for professional support and convenience even when the underlying software is free. Others provide managed or cloud versions of open-source tools. This 'free software, paid services' model funds development while keeping the software itself open. It's why you can download powerful open-source software for nothing, while companies simultaneously build sustainable businesses supporting it. The software is free; the expertise, support, and convenience around it can be sold.

Why it works (and its challenges)

This diverse funding, corporations, volunteers, foundations, donations, and support businesses, is why open source produces software reliable enough to run the internet, banks, and governments, all free to use. But the model has real challenges: some critical projects are maintained by a few unpaid, overstretched volunteers (a risk highlighted when such projects have security issues), and funding can be uneven, with unglamorous but essential software sometimes under-supported. This has sparked growing efforts to better fund and sustain key open-source projects. Still, the overall model works remarkably well, which is why free software is so pervasive, capable, and, surprisingly, well-maintained.

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See also: What is open source software, really?, What is Linux and why it runs the world.

Sources

• Business models for open-source software - Wikipedia

Published date reflects the original event date (2025-02-11). This article is original Skillo editorial written from the sources above; facts were verified in September 2026.