Not as feature-rich, but signup for a free account at Majestic - https://majestic.com/ - and then verify your domains. After verifying you’ll get basically the paid feature set but just for your own domains.
No clue, give it a shot though. I login and check my personal sites at minimum once a month, but more often weekly, so this isn’t really a concern for me.
They run their own index of the web trying to emulate Google’s - and then apply their own version of Google’s PageRank algorithm and others to try and determine link quality. So you can use it to look at links to your own sites or your competitors to see where you could get the same/similar quality links.
IMO Ahrefs has the better index, but Majestic is quite good - especially for free and I sorta prefer their TrustFlow/CitationFlow metrics over Ahrefs’ URL Rating/Domain Rating. But because of the weaker index I can’t just accept it on its own.
This is a good post from Ahrefs though explaining their metrics:
Thank you, I did give it a try, but the free tier seems to be pretty limited, and the results I got there could easily get those from Google Analytics <.<. After 2 minutes using it, it just said I couldn’t use it more for today. Meh.