The Grammar Check of texstudio is Languagetool which is really not a grammar checker (although best in the opensource environment). I was wondering if anyone knows a way to connect one of the good grammar checkers to it. Grammarly and or ProWritingaid are examples that I like to be considered.
Edit:
Recently Grammarly released a version it calls Grammarly for Windows. This app directly operates in Windows applications. Unfortunately, it doesn't seem to operate in Texstudio. Is there any way to benefit from it while writing in the texstudio?

vim, others useemacsothers use something else. But using a (instant) grammar checker is not related to TeX or LaTeX at all. – Johannes_B Nov 01 '17 at 22:33