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AI Undetect 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. AI Undetect starts at $5, Undetectable AI at $9.99. Both have a free tier. Both ship a public API.

AI UndetectRewrites AI-drafted text to read as human and pass detector checks, with a built-in multi-detector scanUndetectable AIRewrites machine-written drafts to read human, with detection scoring built in

Side by side

FactAI UndetectUndetectable AI
CategoryAI Detection & HumanizersAI Detection & Humanizers
Pricing modelFreemiumFreemium
Starts at$5 month$9.99 month
Public APIYesYes
PlatformsWeb, APIWeb, API, Chrome Ext
Company—Undetectable Inc.
Launched—2023
Last verifiedSep 6, 2026Sep 6, 2026

What our research says

AI Undetect

It bundles rewriting and detector checks into one loop, which is the workflow people actually follow, and entry pricing is low. The catch is the category itself: detection engines retrain constantly, so passing today proves nothing about next month, and using it on academic work can breach integrity policies.

Pros

  • Free allowance to test output quality before paying
  • Detector panel shows results across multiple engines at once
  • Low entry price on annual billing
  • Rewrite API is documented for integration work

Cons

  • Effectiveness is a moving target as detectors retrain
  • The company behind the site is not identified anywhere on it
  • Word caps on lower tiers are easy to exhaust

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 AI Undetect if you need

  • SEO and affiliate writers reworking AI drafts before publishing
  • Non-native English speakers smoothing machine-assisted prose
  • Teams that want rewrite plus detector check in one place

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