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Lunchbreak 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. Lunchbreak AI starts at $10, Undetectable AI at $9.99. Both have a free tier. Only Undetectable AI ships a public API.

Lunchbreak AIChecks essays against Turnitin, GPTZero and other detectors, then rewrites flagged passages to read as human-written.Undetectable AIRewrites machine-written drafts to read human, with detection scoring built in

Side by side

FactLunchbreak AIUndetectable AI
CategoryAI Detection & HumanizersAI Detection & Humanizers
Pricing modelFreemiumFreemium
Starts at$10 month$9.99 month
Public APINoYes
PlatformsWebWeb, API, Chrome Ext
CompanyLunchbreak AIUndetectable Inc.
Launched—2023
Last verifiedSep 1, 2026Sep 6, 2026

What our research says

Lunchbreak AI

Lunchbreak AI is built specifically around beating named AI detectors rather than generic paraphrasing, which is a narrower and more testable claim than most humanizer tools make. The obvious catch is that using it to submit AI-assisted work as your own can violate academic integrity policies regardless of whether it fools a detector.

Pros

  • Tests against six named detectors, not just one
  • Rewrites flagged passages instead of the whole document
  • Free plan lets you try it on a real essay before paying

Cons

  • No company name or location disclosed
  • Detector-beating claims can't be independently verified and detectors change over time

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 Lunchbreak AI if you need

  • Writers who draft with AI and need a natural-sounding final pass
  • Non-native English speakers smoothing AI-assisted drafts

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