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Humanize Max 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. Undetectable AI publishes a starting price ($9.99); Humanize Max does not. Both have a free tier. Only Undetectable AI ships a public API.

Humanize MaxFree AI-text rewriter with four styles, term locking and no account, sign-up or word cap.Undetectable AIRewrites machine-written drafts to read human, with detection scoring built in

Side by side

FactHumanize MaxUndetectable AI
CategoryAI Detection & HumanizersAI Detection & Humanizers
Pricing modelFreeFreemium
Starts at—$9.99 month
Public APINoYes
PlatformsWebWeb, API, Chrome Ext
Company—Undetectable Inc.
Launched—2023
Last verifiedSep 1, 2026Sep 6, 2026

What our research says

Humanize Max

Everything free with no signup is rare enough in this category to be the main reason to try it, and term locking is a genuinely practical touch when brand names would otherwise get paraphrased away. The flip side is that a tool with no revenue model and no named operator gives you nothing to rely on if it changes or disappears.

Pros

  • Every feature free with no cap on words or reruns
  • No account or sign-up required
  • Four writing styles plus shorten and expand control
  • Term locking keeps chosen words intact

Cons

  • No company or country identified anywhere
  • No API and no team features
  • No stated revenue model, so longevity is unclear

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 Humanize Max if you need

  • Quick one-off rewrites without creating an account
  • Writers who need brand terms preserved through a rewrite
  • Anyone unwilling to pay for a humanizer

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 Humanize Max alternatives →All Undetectable AI alternatives →Browse all AI Detection & Humanizers →