The Seoscout service is a very useful tool for typical SEO tasks.
Probably the main task of the service is to optimize the content when writing an article for the site.
However, the service offers many free tools.
Paid tools, as I understand them, are primarily designed for writing articles and optimizing them. I think this service can be useful not only for SEO specialists, but also for copywriters and writers.
Among the free tools, the keyword research tool is at the top of the list. You should definitely give it a try.
A useful tool for working with keywords is the Keyword Combiner. Keyword Combiner allows you to combine words to create new combinations.
There's also the Keyword Grouping Tool. You can group words, do clustering in different languages with Keyword Grouping Tool. A huge selection of languages for clustering.
Keyword Intent Categorizer is another useful and free tool. You can use it to categorize your intent keywords into Commercial, Informational, Comparing, Navigating, and Branded.

And another useful tool among the free ones helps to see the density of keywords in the text, performs sentiment analysis of the text, readability of the text and other interesting characteristics of the text to understand the quality of the written text.
There is also a tool to preview the Google snippet in the search engine. By substituting your own title and descriptor, you can see how the site description will look in the search engine.
There is also a Schema Generator. Unfortunately, it did not work correctly for me. Maybe the page did not load completely.