Review on RankSider by Bobby Montoya

I like that you can search for different topics, such as SEO or content marketing to find influencer about those specific topic! It's easy to use this tool since it has tons of categories listed out in front of me which helps filter what kind of blogs/bloggers are relevant to my niche.

There is no way to sort by popularity unless you pay $10 per month - but then you lose access to all sorts of other great features (like being able to see how many followers each blog owner has). If your looking into finding an influencer who fits within one particular category than rank sideer may be helpful if they have enough posts available under certain keywords.