Users who have Microsoft 365 should see Microsoft Editor when they access Word Online by selecting the Review tab. Microsoft Editor will help you correct spelling and grammar mistakes and can make suggestions to improve your document based on clarity, conciseness, and vocabulary. You can also use Microsoft Editor to check the similarity of your document.
Grammarly is is an AI-driven proof-reading tool that can check your spelling and grammar and make suggestions to improve your document around correctness, clarity, engagement, and delivery.