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Humanio AI vs Undetectable AI

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. Humanio AI starts at $6.99, Undetectable AI at $9.99. Only Undetectable AI has a free tier. Only Undetectable AI ships a public API.

Humanio AIRewrites AI drafts to read as human prose, with a built-in detector check, sold by weekly word allowance.Undetectable AIRewrites machine-written drafts to read human, with detection scoring built in

Side by side

FactHumanio AIUndetectable AI
CategoryAI Detection & HumanizersAI Detection & Humanizers
Pricing modelPaidFreemium
Starts at$6.99 week$9.99 month
Public APINoYes
PlatformsWebWeb, API, Chrome Ext
CompanyHumanio AIUndetectable Inc.
Launched—2023
Last verifiedSep 6, 2026Sep 6, 2026

What our research says

Humanio AI

A competent humanizer with the sensible addition of a detector in the same subscription, so you are not paying two vendors to check each other. The weekly billing option genuinely suits students who need it for one assignment. Be clear-eyed about what it is for, though: the site's own navigation is a list of detectors to bypass, including Turnitin, which puts it on the wrong side of most academic integrity policies.

Pros

  • Includes an AI detector alongside the humanizer on every tier
  • Weekly, monthly, and yearly billing cycles, including a genuine sub-$10 weekly entry
  • Adjustable rewrite intensity from light touch to full rewrite
  • Accepts PDF uploads and states it preserves keywords for SEO work

Cons

  • No free tier - the pricing page only offers paid plans
  • Detector runs consume the same word allowance as rewrites, so checking costs you twice
  • No company entity, address, or country published anywhere on the site
  • The advertised iOS app and Chrome extension are both marked as not yet available

Undetectable AI

Buy it only if you accept that passing a detector is a moving target: detector vendors retrain constantly, and text that cleared last month can flag next month. As a multi-format detection dashboard it is more defensible than as a bypass tool.

Pros

  • Detector and rewriter run in one pass, so you see which sentences changed and why
  • Coverage extends past text into image, voice, video and document classifiers
  • Browser extension works inside Docs and Gmail rather than a separate tab
  • Entry tier is genuinely cheap at annual rates

Cons

  • Rewrites often flatten voice and add filler to break statistical patterns
  • Detection on short passages is unreliable in both directions
  • Word quotas drain fast because rejected attempts still consume them
  • The free trial caps at 250 words, barely enough to judge output quality

Which one fits

Choose Humanio AI if you need

  • Marketers smoothing AI drafts before publishing
  • One-off deadline weeks where a weekly plan beats a monthly commitment
  • Writers who want keyword-preserving rewrites for SEO copy

Choose Undetectable AI if you need

  • Marketers cleaning up bulk LLM drafts before publishing
  • Editors wanting a second opinion on submitted copy
  • Teams screening images and audio for synthetic origin
  • Non-native writers smoothing register and tone

More comparisons

All Humanio AI alternatives →All Undetectable AI alternatives →Browse all AI Detection & Humanizers →