If you've spent any time reading about technology, you've probably come across the term "open source." But what does it actually mean, and how does it affect the software or products you use? In this post, we’ll break it down into simple terms, provide examples, and explain both the benefits and drawbacks of open source.
What is Open Source?
Imagine sharing a cake recipe together with permission to adapt it and pass it on. For software, the useful distinction is not simply that code is visible: an open-source licence gives people rights to use, modify and redistribute it under specified terms. The Open Source Definition sets the criteria. Openness creates opportunities for collaboration and inspection; it does not promise that every project is maintained or secure.
Types of Open Source Items
There are several categories of open-source products. Here are a few key examples:
1. Open-Source Software
Open-source software provides source code under a licence allowing reuse and modification. Anyone can propose improvements, but maintainers decide what enters their project. You do not need to be a programmer to use an open-source application.
- Linux: A widely used operating system, especially in servers. (Official Linux Website)
- Firefox: A web browser that anyone can download and use, with contributions from developers around the world. (Official Firefox Website)
- LibreOffice: An office suite that offers similar functionality to Microsoft Office, but is completely free to use and modify. (Official LibreOffice Website)
2. Open-Source Hardware
Open-source isn't just for software—it can apply to hardware too. In this case, the designs and blueprints for physical devices are shared publicly so others can improve or build upon them.
- Arduino: An electronics platform with open hardware and software projects. The UNO R3 documentation, for example, publishes schematic and CAD resources. Inspect each board’s design licence rather than assuming every product with compatible pins has identical rights. (Official Arduino Website)
- Raspberry Pi: A popular platform for Linux and open-source development tools. Its Pico SDK licence permits source and binary reuse under its conditions. That software licence does not establish that every board, firmware component or chip design is open hardware. Check the exact component and design rights. (Official Raspberry Pi Website | View all Raspberry Pi related articles)
3. Open-Source Platforms and Communities
There are entire platforms and communities that exist to share open-source projects, encourage collaboration, and facilitate development.
- GitHub: A hosting and collaboration platform containing both open-source and other repositories. A public repository alone does not grant an unrestricted licence. Official GitHub Website provides the original platform link; its licensing guidance explains the distinction.
- Wikipedia: A collaborative encyclopedia whose text generally follows free-content licensing, including Creative Commons Attribution-ShareAlike. Check each item’s licence for reuse, especially media. The MediaWiki software powering it is a separate open-source project. (Official Wikipedia Website)
The Opposite of Open Source: Proprietary Software
Proprietary software grants a more restricted set of rights through its licence. It can be paid or free of charge, and some source may still be visible under restrictive terms. Ownership is not the distinction: open-source authors also retain copyright. Plugins and documented customization can exist in proprietary products without giving users permission to redistribute the underlying application freely.
Here are some common examples:
- Microsoft Windows: A proprietary operating system used under its applicable licence; a device may include that licence. Configuration or extension is different from unrestricted access to the complete product source.
- Adobe Photoshop: A proprietary creative application. Its commercial access and extension options do not make the complete application open source.
- iOS: Apple controls the complete platform’s distribution, even though a proprietary product can contain separately licensed open-source components.
Pros of Open Source
Open-source products offer a range of benefits:
1. Cost
Most open-source software is free to use. This makes it an affordable option for both individuals and organizations.
2. Customization
Since the source code is available, anyone with programming skills can customize it to suit their specific needs. This is useful for businesses or hobbyists who want more control over the functionality of the software they use.
3. Community Collaboration
Community participation can bring improvements, testing and useful discussion. Project size, funding and maintainer availability vary, though. A public issue tracker is an opportunity to assess responsiveness, not a guarantee that bugs are fixed quickly or that your feature request will be accepted.
4. Transparency
Available source lets people inspect behavior and investigate problems. It does not prove that somebody has audited every dependency, that a downloaded binary matches that source, or that no vulnerability or malicious change exists. Use trusted distribution channels, supported releases and sensible access controls alongside that transparency.
Cons of Open Source
While open source has many benefits, it also has some downsides when compared to proprietary alternatives:
1. Technical Knowledge Required
While anyone can use open-source software, customizing or troubleshooting it often requires technical skills. For non-technical users, proprietary software with dedicated customer support may be easier to use.
2. Less User-Friendly
Open-source software can sometimes have a steeper learning curve. It may lack the polished interface or ease of use that many proprietary software products offer, especially if the open-source project is still in early development stages.
3. Support and Documentation
Support can come from volunteers, a vendor or a paid service for either licensing model. Check documentation for the release you plan to use, what support is actually included, and how serious security reports are handled. A paid proprietary licence does not automatically include prompt assistance.
4. Fragmentation
Because open-source projects can be modified by anyone, you might encounter multiple versions of the same software, which can cause compatibility issues or confusion about which version to use.
Software, Hardware and Content Have Different Boundaries
The Open Source Hardware Association definition concerns modifiable design files and permission to make and distribute hardware from them. A readable schematic is useful, but the format and rights matter. A PDF that cannot replace the editable design files is not the whole story, and an open board design does not necessarily supply the source for every silicon component.
For articles and images, inspect the content licence separately. Wikimedia’s terms distinguish text, media and exceptions. An encyclopedia inviting contributions is not permission to copy every picture without checking attribution and other requirements. The hosting software, the published content and the organisation’s trademarks have different rules.
Permissive, Copyleft and Source-Available Terms
Several licence families meet the open-source definition. Their practical obligations differ. The following is an orientation for reading the actual terms, rather than a rule that all licences behave alike:
| Family or example | Useful distinction | What to inspect |
|---|---|---|
| MIT and other permissive licences | Broad reuse, including commercial distribution, with conditions. | MIT requires retaining its copyright and permission notice in covered copies. |
| Apache 2.0 | Permissive terms with an express patent provision. | Redistribution, change notices, applicable NOTICE material and patent conditions. |
| GPL | Copyleft requirements apply to covered works and distribution. | Exact version, corresponding source and obligations for the way the work is conveyed. |
| MPL 2.0 | File-level copyleft, rather than a blanket GPL rule. | Modified covered files and source availability for recipients of distributed software. |
| AGPLv3 | Adds a condition concerning modified versions used remotely over a network. | Section 13’s source offer to users interacting remotely with that modified version. |
| Source-available terms | Visible code may have restrictions outside the open-source definition. | Actual permitted uses, hosting/distribution restrictions and the relevant edition. |
Read the MIT, Apache 2.0, GPLv3 and AGPLv3 texts for precise conditions. Mozilla’s MPL FAQ explains why combining code and distributing modified files requires more care than “every change must use GPL.” Private modification, distribution and remote interaction are different situations.
Commercial is not the opposite of open source. OSI’s FAQ explicitly allows commercial use and selling open-source software. A company can charge for hosting, maintenance or support. Conversely, a free download can be proprietary. Distinguish the rights provided from the price of your chosen service.
Choose a Project You Can Maintain
- Identify the exact release and licence. Read its licence file and note separately licensed components. A repository badge or product slogan can omit important edition differences.
- Check the functions you need. Account management, multifactor authentication, SSO and backup encryption are product capabilities, not mandatory features in the definition of open source. Verify what the chosen edition supplies.
- Inspect maintenance evidence. Read recent release notes, security reporting instructions and unresolved issues. A busy commit graph alone does not prove dependable support.
- Test an exit and recovery path. Export a small representative dataset and restore it elsewhere. Include files, metadata, permissions and relationships your workflow needs.
An SQLite or PostgreSQL database is not automatically a simple portable export: another application needs to understand its schema. A directory of original photos can preserve images while losing albums or account permissions. Being allowed to fork source also does not guarantee someone will fund or maintain the fork after a project closes.
For a homelab, try a limited realistic workload before committing your important data. Record the release, configuration and backup process. A tool earns its place when it performs the job and can be recovered, whether it is maintained by a community, a business or both.
Contribute Without Writing Code
You can improve documentation, report a reproducible issue, translate interface text or help test a release. Follow the project’s contribution instructions and provide the version, environment and steps needed to reproduce a problem. Remove credentials and personal data from logs before sharing them.
Respect maintainer time and the scope of the project. A clear report is more useful than demanding a feature, and an alternative fork carries its own maintenance work. This practical collaboration is one of open source’s strengths, alongside the cost and control that make it appealing.
Conclusion: What You Should Know About Open Source
Open source offers useful opportunities for affordability, customization and inspection. Usability, security and maintenance depend on the specific project. For software, hardware and shared content, identify which parts are open and which licence applies before treating them as one category.
For many users, the benefits of open-source—like cost savings and control—make it an appealing option. But for those who prefer convenience and dedicated support, proprietary software might still be the better choice.
Now that you know what open source is, you can make informed decisions about the tools and products you choose to use!
