Can software with an GPL3-0 license be sold as a product after it has been modified?
<p>I have a project which uses <a href="https://github.com/ultralytics/yolov5" rel="nofollow noreferrer">yolov5</a>. I modified the yolov5 and implemented it into my own project (I don't just use the modified version of yolov5 as project. It is just a part of my project.). I read the GPL3-0 license but it contains a lot of terms so that I couldn't fully understand it. Can i sell this project as a product and earn money, is this legal?</p>

<p>Yes, the GPL v3 (like all free/libre/open source software licenses) allows you to sell derivative works (or unmodified versions). However, it is a copyleft license, so you must release your derivative work (and possible your entire product) as FLOSS under the same license. You should talk to a lawyer about this to determine what does and what doesn't need to be GPL'ed, unless you want to make your entire codebase FLOSS.</p>

<p>The rules are simple: When you ship the software, you must ship it together with the GPL license. You are allowed to do the following:</p>
<ol>
<li><p>Sell the software together with the GPL license, for any amount of money that someone is willing to pay you.</p>
</li>
<li><p>Charge reasonable cost for providing the source code if someone asks you for it.</p>
</li>
<li><p>You are not allowed to charge for the GPL license itself. You must provide that at no cost.</p>
</li>
</ol>
<p>As &quot;Someone&quot; commented elsewhere, if you sell software to businesses, they would legally be allowed to hand the software for free to a competitor, but as a business, you don't give your competitors anything of value for free. So you can likely sell to competitors as well.</p>

open-source-software gpl