Serpstat is an all-in-one SEO platform with standout keyword clustering functionality that groups semantically related terms into topical clusters automatically - a genuine time-saver when building out a new content silo for an adult directory category. The site audit is thorough, the rank tracker goes to city-level granularity, and the backlink module covers the basics. It is used by large organisations but priced to be accessible to agencies and independent operators.

Plans start in the mid-tens per month, making it competitive mid-market pricing. Data breadth for non-English markets can lag behind Ahrefs and Semrush.