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StealthGPT vs SuperHumanizer

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. Only SuperHumanizer is free. Only StealthGPT ships a public API.

StealthGPTRewrites AI-generated text to slip past AI detectorsSuperHumanizerRewrites AI-drafted text to read as human-written and lower AI-detector scores, free with no signup.

Side by side

FactStealthGPTSuperHumanizer
CategoryAI Detection & HumanizersAI Detection & Humanizers
Pricing modelPaidFree
Public APIYesNo
PlatformsWeb, API, Chrome ExtWeb
CompanyXYZ AI Inc.—
Launched2023—
Last verifiedSep 6, 2026Sep 1, 2026

What our research says

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

SuperHumanizer

SuperHumanizer is a free, no-signup way to soften the tell-tale patterns of AI-drafted text before publishing it elsewhere. It works fast and includes its own detector check, but its bypass-rate claims come only from the vendor and cannot be verified independently. Treat it as a polishing pass rather than a guarantee against any specific detector.

Pros

  • No account or payment required
  • Two rewrite intensities depending on how much change is needed
  • Built-in AI-detector check on the same page
  • Fast turnaround, seconds per submission

Cons

  • 1,200-word cap per submission forces splitting longer documents
  • Detector-bypass claims are unverified vendor statistics
  • No visible company name or contact details beyond the site itself

Which one fits

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

Choose SuperHumanizer if you need

  • Students and writers who want a quick pass to reduce robotic phrasing
  • Anyone testing how a draft scores on AI detectors before submitting it
  • One-off rewrites under 1,200 words

More comparisons

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