ProofWrite 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 ProofWrite (StealthGPT has paid plans only)
Public API: StealthGPT has one; not confirmed by us for ProofWrite
Higher Trust score: StealthGPT — 86 vs 57 for ProofWrite
Best fit: ProofWrite: students and academics needing text that reads naturally · StealthGPT: Content operations running bulk rewriting through an API or n8n workflow
Platforms: ProofWrite: 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

ProofWriteRewrites AI-generated text to read more naturally and pass detectors like Turnitin, GPTZero, and Originality.ai.

StealthGPTRewrites AI-generated text to slip past AI detectors

Side by side

Fact	ProofWrite	StealthGPT
Category	AI Detection & Humanizers	AI Detection & Humanizers
Pricing model	Freemium	Paid
Starts at	$9.99/mo	—
Public API	Not confirmed	Yes
Trust score	57 / 100	86 / 100
Platforms	Web	Web, API, Chrome extension, iOS
Company	—	XYZ AI, Inc.
Launched	—	2023
Last verified	Oct 15, 2026	Oct 22, 2026

What our research says

ProofWrite

ProofWrite is built around one specific job: getting AI-written text past detection tools while keeping the meaning intact, verified against a stated list of detectors rather than a vague claim. The catch is that detector behavior changes over time, so passing today's check doesn't guarantee it holds up against a future detector update, and 250 free words isn't much to evaluate quality on your own text.

Pros

checks output against seven named detectors rather than just one
eight writing modes for different tones, including academic, formal, and blog
free tier and no-card signup to test before paying

Cons

detector-passing behavior can change whenever those detectors update their models
only 250 free words to evaluate before hitting a paywall
unlimited-word tier requires the top Ultra plan

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 ProofWrite if you need

students and academics needing text that reads naturally
SEO writers and content teams producing high volumes of AI-assisted copy
anyone needing output checked against multiple named detectors at once

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