| What it does | AI humanizer for multilingual writing with best-in-class Japanese support
| Voice-first AI ghostwriter for storytellers who never wanted to be writers
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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
| Paid
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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
| Credit packs: Notebook ($2.99, 3 credits), Manuscript ($9.99, 11 credits), Novella ($19.99, 25 credits), Novel ($49.99, 65 credits). One credit equals approximately 1,000 finished words. Credits never expire.
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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
| - Voice-to-prose conversion with real-time transcription
- Story Bible that tracks characters, places, and plot threads
- Talk to your characters for story development
- Editorial questions and contradiction detection
- Multiple export formats: EPUB, Word, Markdown, and print-ready HTML
- Story Map showing character relationships and connections
- Type or speak your story, or upload recordings
- Finish Book wizard with cover designer
- Multi-language support for writing in any language
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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
| - Built specifically for storytellers without writing experience, not writers
- Maintains user's original voice and creative control throughout the writing process
- Story Bible automatically ensures consistency across entire manuscript
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 4 ● no change since last check | 4 ▼ −4 (down) since last check |
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| Trust Flow (Majestic) | 11 | 6 |
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| Citation Flow (Majestic) | 14 | 9 |
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| Referring domains (Majestic) | 46 | 5 |
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Suikou AI
CharmWriter