Grammarly alternative?

Hi guys, Grammarly is a really good tool as I believe it helps me write more effectively by fixing small typos. However, I am a master's student and I want the premium version of Grammarly to ace my research papers. Where I live right now, the premium is coming out to be really expensive. Do you have any alteative suggestions? Or a way by which I can the premium at a discount or something? Help will be appreciated, thanks! WordPress ...