SerpBook

SerpBook is a very good platform for rank checking! They are almost completely Google based (and which SEO software isn't?), meaning that they cover every Google domain there is - any country can use SerpBook and see the difference, as far as the website's rank goes. The API is the most useful part, as far as I'm concerned.

I really think SerpBook should update the way their website looks - it does lack some tiny features, but as far as all other services go - their platform seems to be quite useful. Unfortunately, since the market is filled with rank checking and SEO platforms, there are better alternatives to these guys, if you ask me.

Overall, I would have to say that SerpBook is quite decent for both rank checking and search engine optimization as well. Like I said, the website's design is not the best thing out there, and it's the only thing they should rework, since it doesn't look as attractive as some other platforms do. But if anything, their platform is both reliable and affordable!