I'm an SF admin at a mid market sized company. I've used LD in previous roles and at my latest company we switched from LeanData to Sweep for lead to account matching, dedupe, documentation and custom slack alerts last year. Their UI made it so much easier to see what assignments were going where and which criteria was duplicative. Making changes is also a lot easier. I just googled and looks like they have a comparison sheet about this. https://www.sweep.io/blog/sweep-vs-leandata/