To be perfectly honest nothing even comes close to the level of productivity I get in Solidworks. And I’ve tried them all.
Fusion360 is a great alternative if you don’t mind depending on cloud-services for your software to work properly. It handles some things in a more modern way than Solidworks does, and I really like some of the features, it’s just the way the software is built cloud-first that really pisses me off.
Then there’s Inventor, which is actually has some interesting features if you’re a mechanical engineer. The current version is perfectly capable of most things you can do with Solidworks, although I would argue drafting parts is much more of a pain.
If you’re into open source software there’s always FreeCAD, which is what masochists use for their fix. (Honestly it’s not that bad, but there’s absolutely no polish to the user experience)
If you like to use tablets or phones for anything, you could give Onshape a go. It’s a pretty great lightweight replacement, all things considered.
Last, but not least: Altair Inspire. If you like working with generative design this might be the alternative for you. Really fun to work with, but not a full-blown replacement for everything Solidworks offers.