Grammarly
Writing assistant that checks grammar, tone and clarity in Gmail, Outlook and most other apps, and can draft or rewrite replies.
- Free plan or free tier
- Works with Gmail
- Works with Outlook
Grammar and style checker for many languages with browser extensions that work inside webmail, plus AI rephrasing.
Not enough info yet on works with Outlook, mobile app. Check the tool's own site.
Listing written by MailOverload, checked 2026-11-03. Report a correction or request removal. Back to reply writing and templates.