Grammarly for texstudio

I have the same problem. I found the way as follows: When you need to check Grammarly, copy the TeX to https://www.overleaf.com/ and you can also edit and run the TeX in there (online). Then the browser will check this for you. I think this is the best way right now. Or you can use the checker by Texstudio, they have it. But it is very very basic.

This is also a round-about solution, but I used Texstudio to write, fix spelling mistakes, and compile the pdf. Then I used Foxit Phantom PDF to convert it to Word (I know, I almost feel ashamed) but it gets me the results I want which is Grammarly checking my thesis paper. And while it is tedious, having Grammarly point out errors helps me to see my thesis with "fresh eyes" so to say. I do have to have the Word document with Grammarly open next to Texstudio so that I can make the changes in Texstudio as I make them in Word, but it does get the job done. A few iterations of this and my 100+ page thesis is finally presentable.

Although the answer is not for texstudio and I don't know if you have seen this or not, but recently, here is a chrome extension built by this person recently(Oct 3, 2020) who claims the extension works well with overleaf. Following is the link to the answer. Integrating Grammarly with online LaTeX editors such as overleaf?