| What it does | AI humanizer for multilingual writing with best-in-class Japanese support
| AI rephraser for rewriting sentences, paragraphs, emails, and drafts while preserving meaning
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| Stage | Startup
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| Founded | 2026
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| Based in | HK
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| Pricing model | Freemium
| Freemium
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| Pricing | Free: 500 words/day humanize + unlimited detector (no credit card required); Basic: $9.99/month for 50,000 words/month + 30-day history + priority email support; Pro: $19.99/month for 250,000 words/month + academic mode + 90-day history + priority API queue. Student discount: 50% off annual plans wi
| Free: $0/month with 3 standard rephrases per month and up to 3,000 characters per rephrase. Pro Monthly: $29/month with unlimited rephrases, up to 10,000 characters per rephrase, unlimited SuperRephrase™ Mode, and priority support. Pro Annual: $209/year with the same Pro features, saving 40%.
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| Key features | - AI text humanizer with casual, academic, and business modes
- Free AI content detector with ai_score, perplexity, and burstiness metrics
- Morphology-aware Japanese rewriting with conjugation and particle control
- Citation and technical term preservation in academic mode
- Three parallel rewrites scored by separate detector model
- Five-step intensity slider for faithfulness vs. AI-fingerprint tradeoff
- History and re-rewrite capability (30 or 90 days depending on plan)
- Second-pass academic polish with Claude 3.5 Haiku on Pro plan
- Support for English, Japanese, Korean, German, French, Spanish, Portuguese, and Chinese
- Tested against GPTZero, Turnitin, Originality.ai, and Copyleaks
| - Four specialized writing profiles (Academic, Professional, Creative, Casual)
- Adjustable tone and style controls for formality, complexity, brevity, and creativity
- SuperRephrase™ Mode for deeper multi-pass refinement
- Support for sentences, paragraphs, emails, and short drafts
- Character limit of 3,000 characters for free tier and 10,000 for Pro
- ChatGPT plugin integration
- Searchable history of rephrases
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| What makes it different | - Best-in-class Japanese support with morphology-aware morpheme-level tuning, unlike generic humanizers
- Separate AI detector scores rewrites to guarantee the most natural result
- Preserves academic citations, figures, tables, and technical terminology verbatim
- Five-step granular intensity control to trade off faithfulness versus AI-fingerprint removal
- Independent developer with transparent privacy: no model training on user text, fixed deletion schedule
| - Preserves your voice and meaning while finding clearer wording
- AI assists your writing process without replacing your thinking
- Quick rephrase in minutes instead of hours
- Multiple tone and style options to fit any audience or context
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 4 ● no change since last check | 36 ● no change since last check |
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| Trust Flow (Majestic) | 11 | 19 |
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| Citation Flow (Majestic) | 14 | 38 |
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| Referring domains (Majestic) | 46 | 2220 |
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Suikou AI
Rephrase AI