Unverified50% confidenceFactExact time
The GPL (GNU General Public License) sets the condition that anyone may freely use, modify, and distribute the code, but must release derivative works under the same license — the "Copyleft" mechanism.
1
Sources
50%
Confidence
Long-term
Relevance
9/10/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedCopyleft licenses (such as GPL, LGPL, and AGPL) require that derivative works be released under the same or compatible open-source licenses.78% similarUnverifiedGPL系列许可证具有Copyleft传染性，要求衍生作品同样开源，对商业应用形成天然壁垒77% similarUnverifiedOpen-source licenses (such as GPL and MIT License) impose restrictions on the manner in which software is used through contractual terms.77% similarVerifiedThe Apache 2.0 license, unlike the GPL family, allows users to integrate code into closed-source commercial products and includes explicit patent grant clauses, whereas the MIT license does not include an explicit grant of patent rights.74% similarUnverifiedThe MIT License permits closed-source commercial use, with the only requirement being that copyright and license notices be included in all copies; unlike the GPL license, it has no copyleft effect.71% similar
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