Open Source Licenses Comparison 2025
The complete guide for choosing the right open source license for your business projects
Plan your open source strategy
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
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.
