I had checked AppSumo for alternatives to LinkWhisper a few times and had yet to find a solution. A couple of days ago, I stumbled upon Linksy, and man, I haven't been disappointed. I've got a ton of articles on my site that I know aren't linked well internally, so I was able to use Linksy to string them all together seamlessly. This plugin is a massive time saver, and each suggested internal link used NLPs to give the suggested internal links a "score" out of 100, helping me to know the approximate amount of worthwhile internal links to add to my posts.

Grab this deal while you can. There is nothing else out there that works this well!

As a suggestion, I'd like it to be able to add a way to stop adding internal links if they're not within the same post Category so that you can maintain topic clusters.