Skip to content
effecthub

Humanize AI vs StealthGPT

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 publishes a starting price ($14); StealthGPT does not. Only Humanize AI has a free tier. Both ship a public API.

Humanize AIRewrites AI-generated drafts to read as human writingStealthGPTRewrites AI-generated text to slip past AI detectors

Side by side

FactHumanize AIStealthGPT
CategoryAI Detection & HumanizersAI Detection & Humanizers
Pricing modelFreemiumPaid
Starts at$14 month—
Public APIYesYes
PlatformsWeb, APIWeb, API, Chrome Ext
CompanyPaloma Digital LLCXYZ AI 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

StealthGPT

The only thing here that competitors do not match is the developer surface — REST API, MCP server and n8n node — so this is the humanizer you pick if you are automating a content pipeline, not the one you pick to write an essay. Everything it sells is a bet on an arms race the detector vendors are also funding.

Pros

  • Genuine developer stack — documented API reference plus an MCP server, which rivals lack
  • Bundled detector lets you check before and after in one place
  • Chrome extension humanizes directly in any text field
  • Enterprise tier handles up to 20,000 words per run

Cons

  • Pricing page is behind a Vercel bot check, so prices cannot be compared without signing up
  • Daily request caps sit behind plans that market themselves as unlimited
  • Rewriting reliably flattens nuance and introduces awkward phrasing that needs an editing pass
  • Positioning around beating Turnitin invites institutional and reputational risk

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 StealthGPT if you need

  • Content operations running bulk rewriting through an API or n8n workflow
  • Non-native English writers softening obviously templated LLM prose
  • Agencies that need humanizing inside an existing WordPress or Zapier stack

More comparisons

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