What do they mean by open source?

What Does Open Source Mean? Definition and Examples

Understanding what does open source mean is essential for navigating todays tech landscape. This concept drives innovation and collaboration in software development, impacting everything from operating systems to mobile apps. Discover how open source works and why it matters for your projects.

What exactly does open source mean?

The term open source refers to software with source code that anyone can inspect, modify, and enhance. It represents a model of decentralized software development where collaboration is prioritized over proprietary control. Understanding what does open source mean depends on the context - whether you are looking at it as a developer, a business, or a casual user.

Open source adoption has reached 96% among modern software development teams.^[1] This shift means that most of the digital world, from the apps on your phone to the servers powering the internet, relies on what is open source code that is shared openly rather than kept behind locked doors. It is a philosophy that has fundamentally changed how technology is built. But there is one counterintuitive factor that 90% of beginners overlook - I will reveal why being open can actually make software more secure in the security section below.

The Core Pillars: Access, Modification, and Distribution

To be truly open source, a project must meet criteria defined by the definition of open source software and shared industry standards. Simply putting code on the internet is not enough. The legal framework usually involves a license that guarantees three specific rights to every user who downloads the software.

First, users must have access to the source code - the set of human-readable instructions that tell a computer what to do. Second, they must have the right to modify that code to fix bugs or add new features. Third, they must be allowed to redistribute the original or modified versions. Many professional developers contribute to these projects not just for fun, but because they need specific fixes for their own businesses. This collective effort ensures that the software evolves faster than any single company could manage alone.

I remember the first time I tried to contribute to an open source project. I was terrified. I thought my code would be laughed at, or that I would break a system used by thousands. My first three pull requests were rejected immediately because I ignored the projects formatting rules.

It took me two weeks of frustration to realize that open source is as much about community standards as it is about the code itself. Once I focused on their guidelines, my fourth attempt was merged. The relief was incredible. I was no longer just a consumer; I was a builder.

Is open source software free to use?

A common point of confusion is the relationship between open source and cost. In the software world, there is a saying: Think of free as in free speech, not free beer. While most open source software is available at zero cost, the term strictly refers to the freedom to use and change the code, not necessarily the price tag.

Many companies build profitable businesses around open source by charging for support, hosting, or specialized enterprise features. For example, while the core software might be free, businesses often pay for a 99.9% uptime guarantee or 24/7 technical assistance. In fact, companies that contribute heavily to open source report a significant increase in development velocity because they can leverage existing, battle-tested components instead of building everything from scratch. This model creates a cycle where everyone benefits from the core code while specific needs are handled through paid services.

Why being open makes code more secure

Here is the counterintuitive truth I mentioned earlier: making code public usually makes it harder to hack, not easier. This concept, known as Linuss Law, suggests that given enough eyeballs, all bugs are shallow. When thousands of developers can see the code, vulnerabilities are found and patched much faster than in proprietary systems.

Research indicates that open source projects can patch critical vulnerabilities more quickly compared to closed systems.^[4] This is because security researchers and competitors alike are constantly auditing the code. In my experience, a closed-source vendor might take months to acknowledge a bug, whereas an active open source community often has a fix ready within hours of a public disclosure. Wait a second. This does not mean open source is perfect. It just means the transparency creates a faster feedback loop for fixing mistakes. Much safer than hiding them.

Open Source vs Proprietary Software

Deciding between an open source vs proprietary software solution usually comes down to your need for control versus your need for a turnkey product. Proprietary software - like Microsoft Windows or Adobe Photoshop - is owned by a company that keeps the code secret. You pay for the right to use it, but you cannot see how it works or change it.

Choosing the Right Model for Your Project

The choice between open source and proprietary software impacts your long-term flexibility, cost, and security profile.

Open Source Software

- Low - you own your implementation and can move to different support providers

- Usually zero for the software, but requires investment in expertise

- Unlimited - you can rewrite any part of the software to suit your needs

- Transparent - code is audited by the global community continuously

Proprietary Software

- High - you are dependent on the vendor for updates, fixes, and pricing

- License fees or subscriptions, but often includes professional support

- Limited to the features and settings provided by the developer

- Obscure - you must trust the vendor that their code is secure

Startup Pivot: From Custom to Community

TechFlow, a small fintech startup in Ho Chi Minh City, spent six months building a custom encryption engine for their mobile app. Their lead developer, Hùng, was convinced that a unique 'black box' approach would be their competitive advantage.

First attempt: The custom code was buggy and slowed down the app's login time to five seconds. When a security auditor found a major flaw, Hùng spent three sleepless nights trying to patch it, but the fix broke the payment gateway.

The team realized that as a three-person startup, they couldn't compete with thousands of global security experts. They pivoted to using OpenSSL, a world-standard open source library, despite Hùng's initial fear of 'sharing' their secrets.

App performance improved immediately, with login times dropping below 200ms. By switching to open source, TechFlow saved $4,000 monthly in development costs and achieved a 100% security pass rate in their next audit.