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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.

The short answer

Free plan
Only Humanize AI (StealthGPT has paid plans only)
Public API
Both have one
Higher Trust score
Humanize AI — 94 vs 86 for StealthGPT
Best fit
Humanize AI: Agencies cleaning up bulk AI drafts before client delivery · StealthGPT: Content operations running bulk rewriting through an API or n8n workflow
Platforms
Humanize AI: Web · StealthGPT: Web, Chrome extension, iOS

From our own records as of each tool's last check. Anything we have not confirmed is left out rather than guessed. How we verify

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/mo—
Public APIYesYes
Trust score94 / 10086 / 100
PlatformsWeb, APIWeb, API, Chrome extension, iOS
CompanyPaloma Digital LLCXYZ AI, Inc.
Launched—2023
Last verifiedOct 15, 2026Oct 22, 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

Humanize AI vs StealthGPT: the questions people ask

Is Humanize AI cheaper than StealthGPT?

Humanize AI starts at $14/mo. An entry price for StealthGPT is not confirmed by us yet, so check its pricing page before you compare.

Does Humanize AI or StealthGPT have a free tier?

Humanize AI has a free tier; StealthGPT has paid plans only.

Which has a public API, Humanize AI or StealthGPT?

Both ship a public API, so either can be built on; the fact table above shows the platforms each one runs on.

More comparisons

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