Suikou AI vs GPTinf

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 GPTinf
Detail	Suikou AI	GPTinf
What it does	AI humanizer for multilingual writing with best-in-class Japanese support	AI writing toolkit for humanizing, detecting, and refining AI-generated text
Stage	Startup	Not given
Founded	2026	2023
Based in	HK	Not given
Pricing model	Freemium	Freemium
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 tier available for all tools. Paid plans: Lite $4.99/monthly (5000 humanizer words, 2500 paraphraser words), Pro $12.49/monthly (25000 humanizer words, 12500 paraphraser words), Unlimited $29.99/monthly (unlimited humanizer and paraphraser words). Yearly plans available at 50% discount.
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	Free tier with no registration required File upload capability for humanizer and paraphraser
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	Custom non-AI algorithms instead of AI refining AI Achieves average AI score under 5% after humanization 37% better detection results than competitors Human-first approach that supports rather than replaces human thinking Ethical stance against cheating and academic dishonesty
Community votes	0	0
DR (Domain Rating by Ahrefs)	4 no change since last check	70 no change since last check
Trust Flow (Majestic)	11	14
Citation Flow (Majestic)	14	38
Referring domains (Majestic)	46	820

6 details filled in for both companies.

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