Rephrasy
Rephrasy is an AI humanizer that rewrites AI-generated text into natural-sounding text and includes an AI detector.
What Rephrasy is
Rephrasy is an AI humanizer that rewrites AI-generated text into natural-sounding text and includes an AI detector. It is available on web, Android, iOS, through an API, and as a browser extension. The homepage names ChatGPT, Claude, Gemini, DeepSeek, and Grok as sources of text it can humanize, and lists GPTZero, Copyleaks, Turnitin, and Originality.ai among the detectors for checking AI scores. Use cases include academic writing, SEO and blog content, and social media and marketing. Rephrasy supports more than 50 languages, custom writing-style cloning, and Conversational, Paper, and Marketing presets. The Chrome extension works in Google Docs, Gmail, LinkedIn, and other websites. Developer access includes text humanization and detection APIs, an image humanizer API, and an MCP server that works with Claude, ChatGPT, Cursor, and Claude Code using a Rephrasy API key. Plans include a free plan and free trial; paid plans start at $8.25/mo (annual). The terms warn that the service cannot guarantee humanized text will avoid detection by AI detectors.
Good
- Supports more than 50 languages
- Offers custom styles and three presets
- Chrome extension works in Google Docs and Gmail
- Text and image humanizer APIs are available
Watch out
- Cannot guarantee text will avoid AI detection
- Growth plan is billed annually
Who it suits
Rephrasy may suit writers, marketers, and developers who want text rewriting or AI detection across web, mobile, and integrated tools. Its stated use cases include academic writing, SEO and blogs, and social media and marketing.
Verdict
Rephrasy combines rewriting and detection with browser, API, and MCP options. Its stated limitation matters: it does not promise that humanized text will pass AI detectors.
Plans and prices
From Rephrasy's own pricing page, checked 4 Oct 2001.
| Plan | Price | What it gives you |
|---|---|---|
| Growth | $8.25 a month | 100 humanizations/month · Up to 2,000 words each · Chrome Extension · 1 custom writing style · 1 Extended Scan via support · Billed $99 yearly |
| Business | $10 a month | 200 humanizations/month · Up to 2,000 words each · Humanizer API · Chrome Extension · 3 custom writing styles · 2 Extended Scans via support · Billed $120 yearly |
| Quick Pass | $12.99, paid once | unlimited humanizer · unlimited detector · 20 plagiarism credits · one-time · 24 hours |
| Professional | $18.33 a month | 400 humanizations/month · Up to 2,000 words each · Humanizer API · AI Detector and Detector API · Chrome Extension · 10 custom writing styles · 10 Extended Scans via support · Billed $220 yearly |
| Growth | $99 a year | 100 humanizations/month · 2,000 words each · 200,000 words/month · Chrome extension · 1 writing style · 1 extended scan · $99 yearly |
| Business | $120 a year | 200 humanizations/month · 2,000 words each · 400,000 words/month · Humanizer API · Chrome extension · 3 writing styles · 2 extended scans · $120 yearly |
| Lifetime Access | $199, paid once | 2,400 plagiarism/API credits · unlimited humanizer · unlimited detector · one-time |
| Professional | $220 a year | 400 humanizations/month · 2,000 words each · 800,000 words/month · Humanizer API · Detector API · Chrome extension · 10 writing styles · 10 extended scans · $220 yearly |
The facts
Each one read from Rephrasy's own pages, with the date it was checked.
What it does
- AI detector
- The built-in detector reports AI likelihood and is marketed for checking GPTZero, Copyleaks, Turnitin and Originality.ai results.checked 15 Oct 2001
- API input limits
- Plain-text API requests are capped at 12,000 characters; HTML or Markdown requests at 200,000 characters and cost 2.5 times normal billing.checked 15 Oct 2001
- API limits
- The text API documents a 12,000-character plain-text limit and a 200,000-character HTML or Markdown limit.checked 4 Oct 2001
- Chrome listing
- The Chrome Web Store lists version 1.3.2, a 74.21 KiB package, 858 users and a required Rephrasy API key.checked 15 Oct 2001
- Data handling
- The privacy policy says Rephrasy uses VPS providers for text processing and Firebase for data storage, retains data as long as necessary or legally required, and accepts deletion requests.checked 4 Oct 2001
- Detection caveat
- The terms state that Rephrasy does not guarantee humanized text will avoid detection by AI detectors.checked 4 Oct 2001
- Detection checks
- The homepage says users can check AI scores against detectors including GPTZero, Copyleaks, Turnitin, and Originality.ai.checked 4 Oct 2001
- Detector API
- A separate detector endpoint returns an overall 0–100 score or per-sentence depth results and costs one credit per successful call.checked 15 Oct 2001
- Developer access
- The API page documents text humanization and detection APIs, plus an image humanizer API.checked 4 Oct 2001
- Developer examples
- The API documentation includes JavaScript, Python and cURL examples but does not list a packaged SDK.checked 15 Oct 2001
- Google Play data safety
- Google Play says no third-party sharing is declared, while personal information, files/documents and app-performance data may be collected and data is not encrypted.checked 15 Oct 2001
- Humanizer API
- The public REST API uses Bearer keys at v2-humanizer.rephrasy.ai/api/ and starts at $0.10 per 1,000 words.checked 15 Oct 2001
- Humanizer models
- Its API documents v4, ft_clean-v3, v3, Undetectable and SEO models, plus writing-style IDs.checked 15 Oct 2001
- Image API
- The image humanizer API supports batches of 1–100 images and charges 10 credits per image.checked 15 Oct 2001
- Input models
- The homepage names ChatGPT, Claude, Gemini, DeepSeek, and Grok as sources of text it can humanize.checked 4 Oct 2001
- Language coverage
- The homepage claims support for more than 50 languages.checked 15 Oct 2001
- Languages
- The homepage states that the service supports more than 50 languages.checked 4 Oct 2001
- Limit: academic testing
- TextPulse’s review scored Rephrasy 2.93/5 overall and reported weak citation handling and terminology locking, creating risks for academic references, numbers and key terms.checked 15 Oct 2001
- Limit: G2 credits and accuracy
- G2 reviewers report monthly credits can run out on large projects, brand voice may need proofreading, and more language/tone options are wanted.checked 15 Oct 2001
- Limit: independent bypass testing
- DetectionDrama reported tested detector-bypass rates of roughly 67–76% and criticized pricing opacity and uncertain detector effectiveness.checked 15 Oct 2001
Where it runs
- Browser integration
- The Chrome extension can humanize or detect selected text in Google Docs, Gmail, LinkedIn and other websites.checked 15 Oct 2001
- Browser integrations
- The Chrome Extension page says users can humanize and detect text directly in Google Docs, Gmail, LinkedIn, and other websites.checked 4 Oct 2001
The company
- Company profile
- Crunchbase lists Rephrasy as an active private pre-seed AI/SaaS company headquartered in Gröbenzell, Bavaria, with 1–10 employees and two funding rounds whose amounts are hidden.checked 15 Oct 2001
- Legal maker
- The terms identify the provider as Rephrasy, Impressumservice Dein-Impressum c/o, Stettiner Str. 41, 35410 Hungen, Germany, VAT DE351122428.checked 15 Oct 2001
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