SuperHumanizer vs Undetectable AI

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

Cheaper paid plan: Undetectable AI — $9.99/mo vs $12/mo for SuperHumanizer
Free plan: Both have one
Public API: Both have one
Higher Trust score: Undetectable AI — 89 vs 82 for SuperHumanizer
Best fit: SuperHumanizer: Students and writers who want a quick pass to reduce robotic phrasing · Undetectable AI: Marketers cleaning up bulk LLM drafts before publishing

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

SuperHumanizerRewrites AI-drafted text to read as human-written and lower AI-detector scores; free per-run tier, paid word plans and an API.

Undetectable AIRewrites machine-written drafts to read human, with detection scoring built in

Side by side

Fact	SuperHumanizer	Undetectable AI
Category	AI Detection & Humanizers	AI Detection & Humanizers
Pricing model	Freemium	Freemium
Starts at	$12/mo	$9.99/mo
Public API	Yes	Yes
Trust score	82 / 100	89 / 100
Platforms	Web, iOS, Android, Chrome extension, API	Web, API, Chrome extension
Company	Kamranali Limited	Undetectable Inc.
Launched	—	2023
Last verified	Oct 15, 2026	Oct 15, 2026

What our research says

SuperHumanizer

SuperHumanizer is a quick way to soften the tell-tale patterns of AI-drafted text, and the free per-run tier still needs no account. It has grown into a paid product, though: the Premium Engine and the built-in detector now sit behind $12–39 monthly word plans, and the bypass-rate claims come only from the vendor. Treat it as a polishing pass rather than a guarantee against any specific detector.

Pros

Free tier works with no account or payment
Two rewrite intensities depending on how much change is needed
Available on web, iPhone, Android and as a Chrome extension
Per-word API with a free 1,000-word trial

Cons

1,200-word cap per free run forces splitting longer documents
Detector-bypass claims are unverified vendor statistics
The built-in detector and Premium Engine are paid-only

Undetectable AI

Buy it only if you accept that passing a detector is a moving target: detector vendors retrain constantly, and text that cleared last month can flag next month. As a multi-format detection dashboard it is more defensible than as a bypass tool.

Pros

Detector and rewriter run in one pass, so you see which sentences changed and why
Coverage extends past text into image, voice, video and document classifiers
Browser extension works inside Docs and Gmail rather than a separate tab
Entry tier is genuinely cheap at annual rates

Cons

Rewrites often flatten voice and add filler to break statistical patterns
Detection on short passages is unreliable in both directions
Word quotas drain fast because rejected attempts still consume them
The free trial caps at 250 words, barely enough to judge output quality

Which one fits

Choose SuperHumanizer if you need

Students and writers who want a quick pass to reduce robotic phrasing
One-off rewrites under 1,200 words without creating an account
Developers adding humanization to their own product through the API

Choose Undetectable AI if you need

Marketers cleaning up bulk LLM drafts before publishing
Editors wanting a second opinion on submitted copy
Teams screening images and audio for synthetic origin
Non-native writers smoothing register and tone