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Wordtune

Freemium

Wordtune works at sentence level. Instead of generating whole documents, it offers several rewrite options for the sentence you just wrote, along with switches for formal or casual tone and corrections for grammar, spelling and phrasing. It also continues a stalled paragraph, suggests synonyms and translates text into English across ten languages. Most people use it through the Chrome extension inside Gmail, docs or a CMS, and a web editor covers everything else. The Basic plan is free with limits; Advanced costs $6.99 per month, and a three-day trial covers the paid tiers.

QuillBot

Freemium

QuillBot is a set of editing tools gathered around a paraphraser. You paste text and get rewritten versions in more than ten modes, including academic, formal and simple, or define a custom mode for a house style. Grammar checking, an AI detector, an AI humanizer, a plagiarism checker, a summarizer and a citation generator sit in the same account, which makes it useful for students assembling essays and for editors polishing client copy. The free tier caps paraphrasing at 100 words and two modes; Premium at $8.33 per month on annual billing lifts those limits and adds full detector and humanizer access.