SupWriter
Humanize AI text so it reads naturally, in your own voice, and check any draft with the free AI detector before you submit.
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Description
Humanize AI text so it reads naturally, in your own voice, and check any draft with the free AI detector before you submit. Built for students and non-native English writers. 300 words free.
About SupWriter
What is SupWriter?
SupWriter is a writing tool that rewrites an AI-assisted draft, paraphrases it, checks grammar, and scores the draft with one AI detector before you submit.
What SupWriter does
The humanizer rewrites a draft so it reads naturally and keeps the meaning. You choose language, tone, and purpose. A paraphraser changes the wording and can run before the humanizer. A grammar checker covers grammar, spelling, and punctuation. The detector gives one score with sentence highlights. The about page says the twelve names it shows are labels mapped from that one score, not calls to those tools. Results vary, and the page says no tool can guarantee a detector result. New accounts get 300 free words, with no card.
Who SupWriter is for
Students and writers, including people who write in English as a second language, who want to rewrite a draft and check it before they submit. The page says to follow school or employer rules on AI use.
How SupWriter works
Open the editor, set language, tone, and content type, and run the humanizer, paraphraser, or grammar checker. Check the draft with the detector, which keeps checks in history until you delete them. Basic includes a Chrome extension and MCP access, and it does not include the developer REST API. Pro adds that API, Writing DNA, and fast mode. Plans renew until you cancel in settings, under billing. Email support@supwriter.com within 7 days for a refund if less than 20% of the month's words were used.
Key features
- AI humanizer with context-aware processing, sentence restructuring, and tone preservation.
- Paraphraser in 50+ languages, with a two-step path that paraphrases and then humanizes.
- Grammar, spelling, and punctuation checking.
- AI detector with one scoring model and sentence-level highlights. The page says it is a pre-check, not a guarantee.
- Chrome extension, iOS app, API, MCP server, and a command-line tool. MCP on the pricing page names Claude, ChatGPT, and Cursor.
- Basic lists 7 writing tones and 7 content types. Pro lists 15 tones and 16 content types, plus custom, and Writing DNA.
Pricing
As listed on supwriter.com, checked 13 October 2026. Prices can change; see the site for current terms.
- New accounts get 300 free words once, with no card. The page shows a study season sale of 50% off yearly and 20% off monthly.
- Basic shows $9.99 and $4.99 per month, with the $4.99 line billed annually and save $3/month with yearly. It includes 5,000 words a month and 500 words per request.
- Pro shows $19.99 and $9.99 per month, with save $9.99/mo. It includes 15,000 words a month and 2,000 words per request.
- Ultra shows $39.99 and $19.99 per month, with save $20.00/mo. It includes 360,000 words upfront, 5,000 words per request, and priority support.
- Plans renew at the regular price after an introductory discount ends. Prices exclude applicable tax. Refunds: email support@supwriter.com within 7 days if under 20% of the month's words were used. The page says it replies within 24 hours.
Facts from supwriter.com, checked 13 October 2026
- The about page says the detector is unreliable for some languages, including a check that scored human-written Malay text as AI.
- Basic does not include the developer REST API. Pro includes MCP and the developer REST API.
- Contact for the refund policy is support@supwriter.com.
Written from SupWriter's own website (Homepage, Pricing, Features, About). The maker can claim this listing to edit it.
Categories
Frequently asked questions
What does a new account include?
New accounts get 300 free words, with no card needed. Paid prices and limits are on the pricing page.
Does the detector guarantee a score?
No. The page says no tool can guarantee how a detector will score a piece of writing. SupWriter uses one scoring model, results vary, and the twelve names shown are labels mapped from that score, not calls to those tools.
What is the refund rule?
Email support@supwriter.com within 7 days of purchase. If less than 20% of a month's words were used, the page says the refund is in full, and it replies within 24 hours. Cancelling keeps access until the paid period ends.
Who runs SupWriter?
The about page says SupWriter is built and run by its founder, Shriprasanna. It also says output quality varies a lot by language, and that a check scored human-written Malay text as AI.