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EssayFlow 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. EssayFlow starts at $27.98, Undetectable AI at $9.99. Both have a free tier. Only Undetectable AI ships a public API.

EssayFlowEssay generator that writes assignments and scores them against the AI detectors it claims to slip pastUndetectable AIRewrites machine-written drafts to read human, with detection scoring built in

Side by side

FactEssayFlowUndetectable AI
CategoryEssay & Assignment HelpAI Detection & Humanizers
Pricing modelFreemiumFreemium
Starts at$27.98 month$9.99 month
Public APINoYes
PlatformsWebWeb, API, Chrome Ext
CompanyEssayFlow.aiUndetectable Inc.
Launched—2023
Last verifiedSep 6, 2026Sep 6, 2026

What our research says

EssayFlow

EssayFlow is an essay generator sold on one promise — that the output will not trip Turnitin or GPTZero — and it prices that promise steeply. The detectability score next to each draft is at least honest about what it is for. Two things undercut it: the undetectable-word cap of 5,000 a month never moves regardless of tier, so the expensive plans buy volume of ordinary output, and no operating company or country is disclosed.

Pros

  • Reports a detectability score alongside every generated essay
  • Support for over 50 languages
  • Free plan lets you judge output quality before paying
  • Annual billing cuts the entry price from $27.98 to $17.98 a month

Cons

  • The 5,000 undetectable-word allowance is identical on every tier, including Unlimited
  • Entry price is high for what is fundamentally text generation
  • No company name, country or corporate identity published
  • Detector evasion is a moving target with no guarantee attached

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 EssayFlow if you need

  • Drafting and outlining long-form academic writing
  • Non-native speakers producing coursework in one of the 50+ supported languages
  • Rewriting existing drafts into a different register

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 EssayFlow alternatives →All Undetectable AI alternatives →Browse all Essay & Assignment Help →