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AI Humanizer.io vs WriteHuman

Two fact sheets from our own research, side by side — pricing, platforms, API access and status re-checked by us rather than quoted from the vendors. WriteHuman publishes a starting price ($12); AI Humanizer.io does not. Both have a free tier. Only WriteHuman ships a public API.

AI Humanizer.ioFree rewriter that reworks AI-generated text to read as human and to slip past AI detectors.WriteHumanRewrites AI-generated text to read as human and scores it against detector models

Side by side

FactAI Humanizer.ioWriteHuman
CategoryAI Detection & HumanizersAI Detection & Humanizers
Pricing modelFreeFreemium
Starts at—$12 month
Public APINoYes
PlatformsWebWeb, Chrome Ext, iOS, Android, API
Company—WriteHuman
Last verifiedSep 6, 2026Sep 6, 2026

What our research says

AI Humanizer.io

A no-signup humanizer whose whole selling point is beating academic and editorial AI detectors. That makes it useful for the narrow case of rewriting stiff drafts and reckless for the case it actually advertises. There is no company name, no terms we could read and no accountability behind it, which matters if you are relying on the output.

Pros

  • No sign-up, no card and no advertised word limit
  • Handles output from any model, not one vendor's format
  • Explicitly targets the detector families people actually get scored against

Cons

  • The site refuses automated access (HTTP 403), so nothing could be verified first-hand
  • No company, jurisdiction, terms or privacy policy we could read
  • Zero-percent detection claims are unverifiable and detectors change constantly
  • A free tool with no business model means no guarantee it will exist next term

WriteHuman

As humanizers go this one is unusually transparent about its own scoring, showing per-sentence detection probability instead of a single vague pass mark, and its surface area — extension, mobile apps, API, MCP — is wider than most rivals. The catch is what the tool is for: passing AI-detection checks breaches most academic integrity policies, and no vendor can guarantee any detector's verdict.

Pros

  • Sentence-level detection scores rather than a single opaque verdict
  • Chrome extension, iOS and Android apps, plus a documented API and MCP access
  • Free tier lets you judge output quality before paying
  • Annual billing cuts the effective monthly rate by roughly a third

Cons

  • Request counts and word caps are tight on the lower tiers
  • Detector outcomes are probabilistic and shift as detectors are retrained
  • Use is disallowed by most academic integrity policies

Which one fits

Choose AI Humanizer.io if you need

  • Loosening up stiff, repetitive machine drafts before editing them yourself
  • A quick free pass with no account to create
  • Comparing detector-score behaviour against a paid humanizer

Choose WriteHuman if you need

  • Editing machine drafts into prose that sounds less uniform
  • Non-native writers smoothing generated text across 40-plus languages
  • Developers who want rewriting inside their own pipeline via the API

More comparisons

All AI Humanizer.io alternatives →All WriteHuman alternatives →Browse all AI Detection & Humanizers →