Almost 20 years in the making! I have been playing with, stress testing and validating 3rd party keyword research tools for various uses as a digital marketer, for brands, agencies, publishers and other digital media platform providers. For our clients' SEM campaigns on any search engine platform. For our clients' competitive analysis of the organic and paid search segments of the funnel. For content and user experience managers to use even larger sets of informed data in keyword selection and tagging for all content on their owned and earned media. After many experiments, with 3rd party keyword and visibility research tools, some of which have even gone off the market, SEMRush is hands-down, my favorite. Well worth your time and expense.