Wordtune
Suggests rewrites of your sentences as you type in the browser, including in Gmail, to make them shorter, more formal or more casual.
- Free plan or free tier
- Works with Gmail
About Grammarly
Writing assistant that checks grammar, tone and clarity in Gmail, Outlook and most other apps, and can draft or rewrite replies.
Grammarly checks writing as you type in the browser, in desktop apps and on mobile through its keyboard. In email it flags spelling and grammar mistakes, suggests clearer or shorter phrasing, and gives a read on tone, which helps when a reply needs to be firm without sounding rude.
Its AI features can draft a reply from a few words of instruction, rewrite a paragraph in a different tone or shorten a long message. For people who spend hours a day answering mail, the time saved usually comes from the editing pass.
There is a free plan with the core checks; AI features have limits that depend on the plan. For work email, check your company's rules on sending message text to third-party tools before you install it.
Details
Free plan or free tier
YesWorks with Gmail
YesWorks with Outlook
YesMobile app
Yes
Not enough info yet on developer API. 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.