Clever AI Humanizer vs WriteHuman

Clever AI Humanizer

A free humanizer with an actual named US company behind it, which puts it a step above the anonymous crowd in this category. The 3,000-word window and change highlighting make it practical for editing rather than blind pasting. Three languages only, and being free with no visible revenue means no promises about uptime or longevity.

Pros

• +Up to 3,000 words per request, larger than most free tiers allow
• +Highlights the changes it made instead of returning an opaque block
• +Several rewrite styles, including Normal and Clear & Structured
• +Named operator — CleverFiles Inc., New Castle, Delaware — with file upload and run history

Cons

• −English, Spanish and Portuguese only
• −Public API is still a waitlist; no browser extension or mobile app
• −Free with no stated business model, so continuity is uncertain
• −Rewriting to defeat detectors remains a policy problem wherever detectors are used

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

Is Clever AI Humanizer cheaper than WriteHuman?

Clever AI Humanizer is free to use; WriteHuman starts at $12/mo.

Does Clever AI Humanizer or WriteHuman have a free tier?

Both: Clever AI Humanizer is free to use, and WriteHuman has a free tier.

Which has a public API, Clever AI Humanizer or WriteHuman?

WriteHuman ships a public API, as of our last verification. A public API for Clever AI Humanizer is not confirmed by us — check its developer docs before you plan an integration.