Apache 2.0
A permissive open-source software license that lets you use, modify, and redistribute code freely, with just attribution and a notice of changes.
Think of it like
It's like Creative Commons for code—share-alike, but you must credit the original.
Example
Llama, PyCUDA, and many ML tools use Apache 2.0. You can modify Llama, sell a service on top, and you just have to include a copy of the license.
How it actually works
Apache 2.0 explicitly grants patent rights, so if the licensor sues you over patents, the license terminates. It's one of the most permissive licenses; compared to GPL, it doesn't force your code to be open. Clear, battle-tested, widely recognized.
For product teams
Enables commercial use without reciprocal obligations; lowers friction for adoption.
For engineers
Patent grant included; no copyleft requirement.
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