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GPTinf 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. Only GPTinf has a free tier. Only StealthGPT ships a public API.

GPTinfRewrites AI-generated text to read as human-writtenStealthGPTRewrites AI-generated text to slip past AI detectors

Side by side

FactGPTinfStealthGPT
CategoryAI Detection & HumanizersAI Detection & Humanizers
Pricing modelFreemiumPaid
Public APINoYes
PlatformsWebWeb, API, Chrome Ext
Company—XYZ AI Inc.
Launched—2023
Last verifiedSep 6, 2026Sep 6, 2026

What our research says

GPTinf

This is a detector-evasion rewriter and you should judge it as exactly that. If you are a student, running coursework through it is an academic-integrity violation whether or not the detector catches you.

Pros

  • word locking preserves citations, proper nouns and product names through the rewrite
  • a usable trial runs without an account, so you can judge output before paying
  • priced by word volume rather than per seat, which suits occasional use
  • one screen, no setup, no onboarding

Cons

  • independent reviews rate output as inconsistent, particularly across longer paragraphs
  • detector evasion is an arms race, so what passes this month can fail next month
  • no company name, team or jurisdiction disclosed anywhere on the site
  • no API, so it cannot be wired into a content pipeline

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 GPTinf if you need

  • marketers loosening obviously templated AI copy before a human edit pass
  • stress-testing how brittle your own organisation's AI-detection policy is
  • writers who want a paraphrase pass with specific terms locked in place

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

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