Open Source Licenses

Open Source Licenses Comparison 2025 | EasyData

Open Source Licenses Comparison 2025

The complete guide for choosing the right open source license for your business projects

Plan your open source strategy
Open source licenses overview with different software license types
“From MIT to GPL: choose the right license for your project”

Why this open source license comparison?

At EasyData, we regularly receive questions from people struggling with choosing the right open source license. “Which license should I choose for my project?”, or “Can I use this software freely within my organization?”, “Can I use this commercially?” “What does copyleftCopyleft is an application of copyright law that gives the public the freedom to modify and redistribute a work and all derivative works, while making it impossible to redistribute the work or derivative works under conditions that restrict that freedom actually mean?” This confusion is understandable, the open source landscape seems complex, but with the right information it becomes clear.

The reality is that many companies are unnecessarily cautious or overly optimistic about what is possible. Some avoid all GPL-licensed software out of fear of legal problems, while others unknowingly use restrictive licenses in commercial products. Both scenarios cost time, money, and opportunities.

At EasyData, we have 25+ years of experience navigating these choices. We see daily how the right license strategy accelerates innovation, while the wrong choice can delay projects. That’s why we created this practical comparison – no legal jargon, but concrete guidance for businesses.

The main misconceptions we encounter

“Open source means free and without obligations”
Not true. Every license has conditions. Even the most permissive licenses require copyright notices.

“GPL software can never be used commercially”
Incorrect. GPL software can be used commercially, but has specific conditions for distribution.

“MIT and Apache are the same”
Almost, but Apache 2.0 offers explicit patent protection that can be crucial for some projects.

Complete comparison: open source licenses for 2025

The most important open source licenses analyzed based on suitability:

License Type Commercial use Copyleft effect Patent protection Complexity Best for
MIT License Permissive ✅ Fully free ❌ None ❌ None 🟢 Simple Commercial products, maximum adoption
Apache 2.0 Permissive ✅ Fully free ❌ None ✅ Yes 🟢 Simple Enterprise software, patent-sensitive sectors
BSD 3-Clause Permissive ✅ Fully free ❌ None ❌ None 🟢 Simple Academic projects, legacy systems
GPL v3 Strong copyleft ⚠️ With restrictions ✅ Strong ✅ Yes 🟡 Medium FOSS community, anti-proprietary philosophy
GPL v2 Strong copyleft ⚠️ With restrictions ✅ Strong ❌ Limited 🟡 Medium Legacy FOSS projects
LGPL v3 Weak copyleft ✅ For libraries ⚠️ Limited ✅ Yes 🟡 Medium Libraries and frameworks
AGPL v3 Network copyleft ❌ Very limited ✅ Very strong ✅ Yes 🔴 Complex SaaS alternatives, MongoDB model
Mozilla Public License 2.0 Weak copyleft ✅ Mostly free ⚠️ File-level ✅ Yes 🟡 Medium Mixed codebases, Mozilla-style
Eclipse Public License Weak copyleft ✅ Enterprise friendly ⚠️ Module-level ✅ Yes 🟡 Medium Enterprise development tools
Creative Commons Zero Public domain ✅ Fully free ❌ None ❌ None 🟢 Simple Data, content, documentation
Unlicense Public domain ✅ Fully free ❌ None ❌ None 🟢 Simple Simple utilities, example code
ISC License Permissive ✅ Fully free ❌ None ❌ None 🟢 Simple npm packages, Node.js ecosystem
Boost Software License Permissive ✅ Fully free ❌ None ❌ None 🟢 Simple C++ libraries, header-only code

Complexity legend: 🟢 = Simple, 🟡 = Medium, 🔴 = Complex

Legal implications may vary by jurisdiction. Always consult a legal expert for specific implementations and commercial applications.

Which license fits your project?

Organizations regularly get stuck on unexpected license restrictions in their document processing stack. As technicians, we often see projects that get stuck halfway through because nobody really read the fine print. We know the situation ourselves of wanting to integrate our own OCR technology into a SaaS product, but then discovered that the solution was suddenly no longer free for commercial enterprise use. EasyData preferably uses permissive open source libraries (MIT/Apache 2.0) in our architecture, with clear documentation about what is and isn’t allowed. Our architecture prevents vendor lock-in, so your data remains your data, and you can always switch later without technical or legal problems.

Our recommendation based on 25+ years of experience:

🏢 For commercial business projects: Apache 2.0
Patent protection is crucial in the data processing sector. This protects you against patent claims from contributors.

🚀 For maximum adoption and simplicity: MIT License
Simple, clear, and corporate-friendly. Ideal if you want everyone to use your project.

⚠️ Avoid GPL unless you consciously choose open source strategies
GPL can limit your commercial options. Understand the implications before you commit.

Still in doubt? EasyData helps organizations choose the right open source stack for their application. We analyze not only your tech stack and compliance requirements, but also the total cost of ownership. Open source seems free, but security patches, dependency updates and breaking changes cost on average more than a comparable commercial alternative. We calculate in advance what the actual maintenance costs will be, so your IT budget has no surprises.

Our managed service takes the maintenance off your hands: automatic updates, security monitoring and backwards compatibility.
The result: predictable costs, no vendor lock-in, and a document processing solution that scales without your developers constantly busy with maintenance.

💡 Smart advice: Send us your project details and we’ll advise you which license fits best, 25+ years of expertise that protects you from costly mistakes.

Frequently asked questions about open source licenses

Can I use GPL software in my commercial product?

Yes, but with important conditions. GPL software can be used commercially, but if you distribute it you must make the source code available under the same GPL license. This means that your own code that you combine with GPL code must also fall under GPL. For internal business use without distribution, these rules do not apply.

What is the difference between MIT and Apache 2.0?

Both are permissive licenses, but Apache 2.0 offers explicit patent protection. If someone files patent claims against software that contains Apache 2.0 licensed code, they automatically lose their license rights. MIT has no explicit patent provisions. For business software, we therefore recommend Apache 2.0.

Must I release my source code if I use open source software?

This depends on the license. Permissive licenses (MIT, Apache, BSD) do not require this. Copyleft licenses (GPL, LGPL) require that you share changes to the licensed code, but not your entire application. AGPL goes further and also applies to web services. The specific conditions differ per license.

What about liability with open source software?

Almost all open source licenses contain disclaimers that protect developers from liability. As a company using open source software, you remain responsible for the consequences. This means you must do due diligence: check for security issues, maintain updates, and ensure your own backup and disaster recovery plans.

Which license should I choose for my new project?

This depends on your goals. For commercial projects where you want maximum freedom: Apache 2.0 or MIT. For community projects where you want to prevent others from making your work proprietary: GPL v3. For libraries that should be widely used: LGPL or permissive licenses. EasyData usually advises Apache 2.0 for business projects because of the patent protection.

Ready to optimize your open source strategy?

Join organizations that make strategic open source choices. Our 25+ years of experience in software development helps you find the right balance between open source benefits and operational stability.

📝 About the author

Rob Camerlink - CEO EasyData Netherlands

Rob Camerlink
CEO & Founder of EasyData

25+ years pioneer in software development | Expert in open source strategies and legal compliance | Specialist in business software and data solutions since 1999.