Grammarly is a writing assistant available on free or paid plans. You can use it as an app or a browser extension to check your grammar, tone, and spelling. It also has a plagiarism checker.
Grammarly works on major platforms like Microsoft Word and Google Docs. You can turn it on or off on certain websites, but it doesn’t work on every platform. Its free version has limited functionality, while its paid business plan starts at $15 per user monthly.