| What it does | AI humanizer for multilingual writing with best-in-class Japanese support
| Turn notes, PDFs, or lecture slides into an exam-ready study guide with every point linked to its source page
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| Stage | Startup
| Startup
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| Founded | 2026
| Not given
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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: 2 guides/day without account or 10/month with free account. Student Plus: $3.49/month or $41.88/year (100 guides/month). Student Pro: $4.99/month or $59.88/year (300 guides/month). Starter Pack: $4.99 one-time (50 credits, 12 months valid). Exam Pack: $9.99 one-time (150 credits, 12 months val
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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
| - Convert PDFs, PowerPoint, Word documents, and text notes to structured study guides
- Page and slide citations for every key point
- Includes outline, key concepts, glossary, practice questions, and flashcards
- Export to PDF, Word, and CSV for Anki or Quizlet
- Teacher mode with fill-in-the-blank worksheet and answer key
- Deep mode for thorough, detailed guides
- Merge up to 3 files into one study guide
- Free access without sign-up: 2 guides per day
- Save and organize guides in personal library
- Multiple depth options: Quick, Standard, and Deep
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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
| - Every point cited to exact source page or slide for easy verification
- Built-in active recall through practice questions and flashcards
- No sign-up required to start; free tier with no paywall
- Clean, print-ready PDF and editable Word exports
- Honest, straightforward pricing on a single page
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 4 ● no change since last check | 14 ▲ +1 (up) since last check |
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| Trust Flow (Majestic) | 11 | 1 |
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| Citation Flow (Majestic) | 14 | 31 |
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| Referring domains (Majestic) | 46 | 25 |
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Suikou AI
Study Guide Maker