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Suikou AI vs airtxt

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 airtxt
DetailSuikou AI logo Suikou AI airtxt
What it doesAI humanizer for multilingual writing with best-in-class Japanese support AI voice typing, meeting bot, and voice memos for iPhone
StageStartup Startup
Founded2026 Not given
Based inHK US
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 Free: Unlimited on-device dictation, AI cleanup up to 2,000 words/week, custom vocabulary included. Pro: $9.99/mo with unlimited dictation and AI cleanup (fair use), cloud transcription (~250 min/month), meeting bot (5 hours/month), follow-up email drafts, meeting history. Pro+: $19.99/mo with every
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
  • On-device transcription using Apple's Speech framework
  • Cloud transcription with Deepgram Nova-3
  • AI cleanup removes filler words and fixes grammar
  • Meeting bot with speaker-labeled transcripts
  • Multilingual support with 69 language options
  • Custom vocabulary free on all plans
  • Voice memo with clipboard paste
  • Works in any iOS app with text input
  • Follow-up email drafts after meetings
  • Whisper-quiet dictation without speaking at full volume
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
  • Option to keep audio on device with on-device transcription, unlike competitors
  • Meeting bot included in Pro plan starting at $9.99/mo
  • Custom vocabulary free on all plans including Free
  • One-tap dictation with Action Button on iPhone 15 Pro or later
  • Multilingual auto-detection including mid-sentence language switching
Community votes00
DR (Domain Rating by Ahrefs)4 no change since last check4 no change since last check
Trust Flow (Majestic)119
Citation Flow (Majestic)1419
Referring domains (Majestic)4632

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