QuillBot Free paraphrases only 125 words at a time and limits the AI humanizer to 6 uses a day, so most users hit the wall almost immediately. Premium lists at $19.95/mo billed monthly (annual billing is much cheaper), and humanized output can still trip AI detectors.
Wordtune is the closest low-cost rewriter: unlimited free grammar checks, and Unlimited at $9.99/mo. ChatGPT rewrites whole passages on its free plan. Writers polishing long-form work should compare ProWritingAid, whose free checker takes 500 words per check.
| App | Free tier | Paid from | Top plan | Best for |
|---|---|---|---|---|
| QuillBot | Yes | $19.95/mo | $19.95/mo | Students and ESL writers polishing and paraphrasing existing text rather than generating new content |
| Wordtune | Yes | $6.99/mo | $9.99/mo | Writers who want fast, contextual sentence rewrites and tone shifts on text they've already drafted |
| ChatGPT | Yes | $8/mo | $500/mo | Everyday writing, brainstorming, image generation, casual coding |
| Grammarly | Yes | $30/mo | $30/mo | Non-native and casual writers who want real-time grammar, tone, and clarity fixes everywhere they type |
| ProWritingAid | Yes | $30/mo | $36/mo | Novelists, academics, and bloggers who want in-depth style reports (pacing, overused words, readability) on full manuscripts |
Monthly prices in US dollars before tax, from each vendor's official pricing (US list price; weekly-billed plans converted to a monthly figure). Updated November 2, 2026
Wordtune Free gives 10 rewrites a day plus unlimited grammar and spelling checks; Unlimited ($9.99/mo) removes the caps on rewrites, suggestions and summaries.
Pick it if: you rephrase sentences and adjust tone in text you've already drafted.
Where it falls short: It only rewrites existing text, and the daily caps on Free and Advanced are tight.
Full Wordtune pricing →ChatGPT Free has unlimited text chats, so you can ask for a passage to be paraphrased in any tone or reading level. Go ($8/mo) adds memory and projects.
Pick it if: you paraphrase longer passages and don't need a plagiarism checker.
Where it falls short: Output quality varies between model tiers.
Full ChatGPT pricing →Grammarly Free checks grammar and spelling in real time and includes a tone detector. Pro ($30/mo) adds full-sentence rewrites, plagiarism detection and AI-text detection.
Pick it if: you want corrections as you type, plus a way to check text for AI detection.
Where it falls short: Pro is pricey billed monthly, and its AI rewrites are generic next to a real chatbot.
Full Grammarly pricing →ProWritingAid's free checker handles 500 words per check, and Premium ($30/mo) removes the word limit and adds 20+ in-depth writing reports with Word, Google Docs and Scrivener integrations.
Pick it if: you're polishing essays, theses or manuscripts rather than paraphrasing.
Where it falls short: It's a grammar and style checker, not a paraphraser, and the reports can overwhelm casual users.
Full ProWritingAid pricing →QuillBot itself is a reminder that humanized output can still trip AI detectors, so don't buy any of these tools expecting a guaranteed pass. If you're rewriting for clarity, a chatbot or Wordtune does the job well. If you need to check the result, Grammarly Pro includes AI-text detection and QuillBot Free has a basic AI detector.
ChatGPT Free has unlimited text chats for rewriting passages, and Wordtune Free gives 10 rewrites a day plus unlimited grammar and spelling checks.
For real-time grammar and tone checking as you type, yes. For paraphrasing and summarising, QuillBot is the specialist, and its Premium plan costs less than Grammarly Pro billed monthly.
How we choose: prices come from each vendor's official pricing page and are re-checked every week. We take no affiliate fees, so rankings aren't for sale.