I'm glad people are building stuff for Linux, but the people who actually want something like this have likely already been using Opensnitch for years. I'm certainly not going to spend $60 for something that has been doing the job for free.

From the related blog post[0]:

> You can find Little Snitch for Linux here[1]. It is free, and it will stay that way.

[0]: https://obdev.at/blog/little-snitch-for-linux/

[1]: https://obdev.at/products/littlesnitch-linux