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HumanTone 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. HumanTone publishes a starting price ($8); StealthGPT does not. Only HumanTone has a free tier. Both ship a public API.

HumanToneRewrites AI-generated text to read as human-written, with a built-in AI-detection score and 60+ languages.StealthGPTRewrites AI-generated text to slip past AI detectors

Side by side

FactHumanToneStealthGPT
CategoryAI Detection & HumanizersAI Detection & Humanizers
Pricing modelFreemiumPaid
Starts at$8 month—
Public APIYesYes
PlatformsWeb, APIWeb, API, Chrome Ext
Company—XYZ AI Inc.
Launched—2023
Last verifiedSep 1, 2026Sep 6, 2026

What our research says

HumanTone

HumanTone is aimed at teams rewriting AI drafts at volume rather than one-off students, with an API and automation connectors that a single-page humanizer tool would not bother building. The built-in detector score is a convenience, not an independent guarantee that any particular AI-detection tool will pass the result.

Pros

  • Rewrites at a structural level, not just synonym swaps
  • REST API with multiple language SDKs plus n8n and Make connectors
  • Free 1,000-word tier with no signup friction

Cons

  • Mid and top tiers run $16-$40/month before extra credits
  • No public information on the company behind it or its country
  • Detector score is self-reported, not validated against outside tools

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 HumanTone if you need

  • Agencies and SEO teams rewriting AI drafts in bulk
  • Developers who want humanization inside an existing pipeline via API

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

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