I particularly enjoy Ranktracker because of how easy it is to conduct all of your SEO in one location and has the required elements to make it a fully-featured SEO solution for small businesses all the way up.
Their UI interface is quite attractive, clean and user friendly and the tool it is simple to use for analyze, and allows to compare elements and competitors.
Ranktracker's tracking tool provides accurate information regarding your website ranking as well as a complete perspective of how a web page ranks.
The keyword research option is also quite useful as it’s complemented with the keyword difficulty score which indicates how tough it will be to rank for a certain word. The website audit tools display practical actions for removing identified issues.
A disadvantage is each keyword per search engine, location, and mobile/desktop count as a credit, which rapidly adds up.
The customer service is excellent, as difficulties are fixed in a timely manner. The team is always working on new features and improving the product.