Which SEO software is best?

Again, you could come up with a good argument for a few different answers here. Ahrefs is great for competitor content and backlink research; Moz Pro’s content explorer is great for finding unlinked mentions; and SEMrush is great for rank and visibility tracking. The three share many overlapping features. It’s more a matter of preference than anything. Spyfu, AWR Cloud, and DeepCrawl are also worth checking out.