The purple colour is a bit harsh on the eye.
Pricing: put the information in a table so that it is easy to compare the content of the rows. Remove the purple background from the Premium column. (What does the purple background mean? “This is the best value”; “most people buy this version”.)
The terms and conditions are for LanguageTool Plus, but the website is for LanguageTool. Correct the mismatch.
Clarify the relationship between LanguageTool and LanguageTool Plus. (As best I understand, LanguageTool is the open-source product. LanguageTool Plus is a commercial for-profit customization of LanguageTool. Possibly, on Pricing, add URLs for the home page of LanguageTool (=Free) and LanguageTool Plus (= Premium and Enterprise).)
On the left of the LT icon, the first line of text is: Language Tool [note the space]. That should be LanguageTool.