I recommend Vital. Different UI but it's free and can do most (if not all) of the same stuff, from what I can tell (I've not delved deep into Alchemy). Surge XT is apparently more powerful but I find Vital offers plenty of complexity and there's a much steeper a learning curve, so I wouldn't start there.

I don't use Alchemy, but you might list what features you want so that people have a better idea of what to recommend. They aren't going to know what "like" means in this context.