I liked Grammarly, too yet always missed support for other languages.

This is how I found out about LanguageTool.org and came to really dig it. Its feature set is not as extensive as Grammarly's, but what it does works really well for me, plus it has great support for many languages beyond English. It's also a lot more affordable : depending on location, about $5 instead of $12 per month with annual billing. Maybe worth checking out.