This post covers my research into open source software licensing and my analysis of real-world open source projects that profit off of open source code via proprietary licenses.

Keep reading and you’ll learn:

• What the difference between a restrictive and permissive license is
• What dual licensing is and how you can use it make money off of open source code
• What CLAs are and the specific clause your CLA needs for use with dual licensing
• Examples of companies that implement dual licensing and how they do it

And of course: I am not a lawyer and none of this is legal advice.

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Let’s talk evil. And by evil, I mean money.

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