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Humanize 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. Humanize AI starts at $14, Undetectable AI at $9.99. Both have a free tier. Both ship a public API.

Humanize AIRewrites AI-generated drafts to read as human writingUndetectable AIRewrites machine-written drafts to read human, with detection scoring built in

Side by side

FactHumanize AIUndetectable AI
CategoryAI Detection & HumanizersAI Detection & Humanizers
Pricing modelFreemiumFreemium
Starts at$14 month$9.99 month
Public APIYesYes
PlatformsWeb, APIWeb, API, Chrome Ext
CompanyPaloma Digital LLCUndetectable Inc.
Launched—2023
Last verifiedSep 6, 2026Sep 6, 2026

What our research says

Humanize AI

Treat this as a rewrite-and-check bundle, not as a guaranteed way to beat detectors, because detector behaviour shifts constantly and no vendor controls it. For graded academic work the consequences land on you, not the tool.

Pros

  • Bundles detector, plagiarism and grammar tools instead of charging for each
  • API included from the $14 tier, uncommon in this category
  • Side-by-side comparison makes each rewrite reviewable
  • Free tier is large enough to judge output quality before paying

Cons

  • Free plan caps every individual check at 300 words
  • Humanizer and AI-writer budgets are separate, so one exhausts first
  • Rewrites tend to flatten voice and can introduce awkward phrasing
  • Effectiveness against detectors is unstable and impossible to verify

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 AI if you need

  • Agencies cleaning up bulk AI drafts before client delivery
  • Non-native writers smoothing machine-translated copy
  • Teams wanting humanizer, detector and plagiarism checks on one invoice

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