As far as keyword research and backlink analysis goes, after testing many tools, Serpstat has become our go-to tool.

Up to date accurate tracking of my search engine rankings across multiple sites Site issues analysis to fix things that Google may not like

Has just about everything you need to help with your SEO, easily accessible and understandable. Because it came later than some of the more known systems it avoids their outdated menu structures and interface idiosyncrasies. As an SME I also highly appreciate the very sensible price point.