Four tools in one place: rewrite stiff text, proofread drafts, edit Word documents with citations, and check how AI-like a text reads. Each one is paid for by the word, and your text is never stored.
One tool, four jobs
Use one part on its own or all four together. You pay for the words you run through them, and nothing else.
Natural Rewrite turns stiff or generated-sounding paragraphs into plainer wording that keeps the same meaning.
Read the guideGrammar, spelling, punctuation and word choice, with suggestions you accept or ignore. The quick check runs in your browser.
Open the ProofreaderOpen a .docx or start typing. Keep your formatting, turn links into citations, and export a References list.
Read the guideThe AI detector scores the whole text and each sentence. It's a signal to review, not proof of who wrote a text.
Open the AI detectorRewriter example
Same meaning, same facts. Different rhythm, plainer words, fewer stock phrases.
Example for illustration. Every run is different, so try your own text.
How the rewriter works
We showed the model thousands of human-written and AI-written texts side by side. It picked up the habits that give AI text away, like repeated sentence shapes and stock phrases, and learned how people tend to write instead.
Up to 500 words at a time. It works on emails, reports, posts and essays.
It changes how the sentences flow and which words are used. Your meaning and facts stay put, and the length stays about the same.
Each run comes out a little different. If you don't like one, run it again.
Compare
Grainwrite is priced by the word, so you can work out what a text costs before you run it. Credits you buy never expire.
One credit per word you paste in, plus a flat 40-credit fee per request. The cost line shows before you run anything.
It's sent to the model, rewritten and sent straight back. It isn't stored and it's never used for training.
Open a .docx, proofread it, add citations and export a References list in the same editor.
| Feature | Grainwrite | QuillBot | Grammarly | Wordtune |
|---|---|---|---|---|
| Free plan | 300 credits a month | Paraphrase up to 100 words | 100 AI prompts a month | 10 rewrites a day |
| Paid price | $12 a month, or $1 per 3,000 credits | $8.33 a month, billed yearly | $12 a month (Pro) | $4.89 a month, billed yearly (Advanced) |
| Rewriting | Yes | Yes | Full-sentence rewrites | Yes |
| Proofreading | Yes | Not listed | Yes | Spelling and grammar |
| AI detector | Yes | Yes | Yes, in Pro | Not listed |
| Word document editor with citations | Yes | Not compared | Not compared | Not compared |
Competitor details were checked on October 23, 2026 from their public pricing pages. Prices change, so check theirs before you decide.
Plans
FAQ
It shouldn't. The model is built to keep your meaning and facts while changing how they're expressed. Still, read the output before you use it, especially numbers, names and dates, which can occasionally slip. The rewriter flags numbers that went missing, and re-rolling usually fixes it.
300 credits a month. One credit covers one word of the text you paste in, plus a 40-credit fee per request. It resets on the 1st. A single request can be up to 500 words.
Rewrite costs 1 credit per word plus a 40-credit fee per request. Proofread costs 0.5 credit per word plus 40 credits per check. The AI detector costs 0.1 credit per word plus 10 credits per check. In the editor, AI detect is for Pro and bought credits.
No. It estimates how AI-like each sentence reads, so treat the score as a signal and read the text yourself before you decide anything.
The model writes with some variety on purpose. That's part of what keeps the result sounding natural instead of formulaic, so the same text gives a different version each time. Re-rolling runs the model again and uses credits again, which is worth knowing if you're near your limit.
To keep costs (and prices) low, the model switches off when nobody is using it. The first request after a quiet spell waits while it starts up, usually 10 to 30 seconds. After that it's quick. On the free plan, requests also share capacity, so at busy times you may wait briefly in line. Paid plans have their own.
It's sent to the model, rewritten, and sent straight back to you. It isn't stored, and it's never used for training.