Product Name : Ahrefs
Description : Ahrefs helps you learn why your competitors rank so high and what you need to do to outrank them. Audit your website, explore competitors, research keywords & backlinks - all in one place. Powered by seriously big data & trusted by top SEOs.
  
Cameron McElroy
x-Research Scientist, Branch II Investigator at Novartis

I have a few mixed feelings with this. Their keyword analysis, growth potential is one of the best hands-down. However their competitor analysis differs in real-time. For certain keywords their tool shows the competition to be high, whereas a few backlinks easily pushed our website up to the top. Maybe it's just too hard to crack Google!
July 27, 2019