Is KetchUp free? Yes. KetchUp is open source under the MIT license and written in Rust.
Omg why is rust relevant to the question whether this is free or not.
I run it on Arch
Free-as-in-freedom FSF style implies the natural follow on question to "am I allowed to change it" is "how easy will it be for me to change it"...
PS. I think you might also want to review the comment guidelines on this site... e.g. "Please don't post shallow dismissals, especially of other people's work. A good critical comment teaches us something. "
It matters because if it used Electron, people may say it will use more RAM.
The MIT license could use a Rust rewrite.
OP here. I will assume you never built anything in Rust. I didn't get the trend too until I started building stuff with it.
ChatGPT: Rust's biggest advantage is that it provides C/C++-level performance with much stronger memory safety guarantees, without requiring a garbage collector.