Suikou AI vs RewriteBar

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 RewriteBar
Detail	Suikou AI	RewriteBar
What it does	AI humanizer for multilingual writing with best-in-class Japanese support	AI-powered macOS writing assistant for grammar, translation, and productivity
Stage	Startup	Not given
Founded	2026	Not given
Based in	HK	DE
Pricing model	Freemium	Paid
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	$29 one-time for Standard license (1 device), $59 one-time for Pro license (3 devices). Optional RewriteBar Gateway Credits: 100 once for $29 plan, 100 once for $59 plan, 3 million per month available. Free trial with up to 100 corrections.
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	Custom AI actions and workflows Side-by-side text comparison Keyboard shortcuts
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	Works in any macOS app without switching applications Lightweight and privacy-focused design Customizable AI workflows with preset templates One-time purchase with lifetime access
Community votes	0	0
DR (Domain Rating by Ahrefs)	4 no change since last check	46 −1 (down) since last check
Trust Flow (Majestic)	11	10
Citation Flow (Majestic)	14	37
Referring domains (Majestic)	46	472

6 details filled in for both companies.

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