I've used a couple of SEO software programs over the last 4 years. Moz, Serpstat, SEM Rush and now Ahrefs. Since the bulk of my focus is actually building links, I think Ahrefs has the most reliable results. For example, if you checked the backlink profile of 10-20 websites on Ahrefs and compared to another SEO software provider, I bet that you would average at least 10-15% more results with Ahrefs. That can be a lot more opportunities! Their keyword phrase tracker seems to work pretty quickly and seems to be accurate.
We love the Intersecting Link Opportunity report, which helps us plan our link-earning strategy based on the semantic Web and relevancy. There really isn't a better way of finding industry websites to market with that could result in organic link wins. Our team has been using Ahrefs for as long as we can remember, mainly because it offers a higher volume of discovered links when weighed against similar tools.