On: Dogbolt Decompiler Explorer

[gavinray]

IDA Free has essentially all the features of Pro nowadays, if you're only looking to do x86_64 on Windows/Linux.

https://hex-rays.com/ida-free/

The only thing you lose out on is Python scripting, which is kind of big, but for a free tool you really can't complain.

You probably want to use both IDA and Ghidra since they have different strengths/weaknesses and community plugins.