| What it does | AI humanizer for multilingual writing with best-in-class Japanese support
| SEO articles researched, written, fact-checked and published to your website on autopilot
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| Stage | Startup
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| Founded | 2026
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| Based in | HK
| US
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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
| Cloud plans billed per site: Starter $49/month (3 articles a week), Growth $99/month (1 article a day), Pro $179/month (2 articles a day). Yearly billing available at two months free: Starter $490/year, Growth $990/year, Pro $1,790/year. Additional sites get 20% discount. Agents and API: $20 for 100
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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
| - Fact-checking: every number and citation verified against saved source text
- AI article writing using Claude Sonnet and Haiku models
- Topic suggestions from Search Console data and market research
- Multiple publishing options: hosted blog, WordPress, Ghost, webhook, site builder
- Weekly performance reports via email
- Approve-first mode for manual review before publishing
- CLI, REST API, and MCP server interfaces
- Open source self-hosting under AGPL-3.0
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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 claim fact-checked against saved source text before publishing, stopping articles that fail until fixed or manually reviewed
- Completely free first article with full fact-check, no card required
- Open source loop under AGPL-3.0 available for free self-hosting
- 20% discount on additional sites for agencies and multiple properties
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 4 ● no change since last check | 4 ● no change since last check |
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| Trust Flow (Majestic) | 11 | 0 |
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| Citation Flow (Majestic) | 14 | 16 |
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| Referring domains (Majestic) | 46 | 4 |
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Suikou AI
Paperboy