RankTracker is the keyword rank tracking tool of SEO PowerSuite (developed by Link Assistant, founded in 2007 in Latvia), supporting 550+ search engines and regions, with about 500 keywords tracked in the free edition and a one-time Professional license from about $450.
Link Assistant is the developer of SEO PowerSuite, founded in 2007, offering an all-in-one desktop toolkit covering rank tracking, website audit, backlink analysis, and link building for 2,000,000+ SEO professionals. The free version is free forever and Professional starts at $349/year.
