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Suikou AI vs Neubook

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Suikou AI compared with Neubook
DetailSuikou AI logo Suikou AINeubook logo Neubook
What it doesAI humanizer for multilingual writing with best-in-class Japanese support AI studio and reader for books, comics, and printables with optional cloud sync and AI audiobooks
StageStartup Not given
Founded2026 Not given
Based inHK Not given
Pricing modelFreemium Freemium
PricingFree: 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 $9 per book, $9.99 per comic, $5 per printables set, $9 per blog post. Writing and reading are free; prices apply only to download files.
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
  • AI-powered writing in 26 formats across 48 languages
  • Interview-based planning and chapter writing
  • Bite-sized card reading view for focus
  • Bionic Reading to improve reading speed
  • RSS and Atom feed integration
  • Offline reading with no ads
  • Optional free cloud sync across devices
  • AI audiobooks with word-by-word highlighting
  • Export highlights and notes as Markdown
  • Multiple output formats including EPUB and PDF
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
  • Finished, publishable files not drafts in one studio session
  • All output is real—no mockups shown
  • Line-edited writing that reads like a human wrote it
  • No credits or subscriptions needed to write
  • AI disclosure and copyright flexibility for Amazon publishing
Community votes00
DR (Domain Rating by Ahrefs)4 no change since last check3 no change since last check
Trust Flow (Majestic)110
Citation Flow (Majestic)1420
Referring domains (Majestic)4614

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