Undetectable AI

What is Undetectable AI?

Undetectable AI rewrites text so it scores lower on common AI detectors (GPTZero, Originality.ai, Turnitin-class tools) and includes its own detector plus a 'Human Auto Typer'. The detector and typer are listed as unlimited on paid plans; the humanizer is not.

Consumer plans are named by monthly word allowance: 10K ($9.99/month, or $5/month billed yearly at $60), 20K ($19, or $9.50/$114 yearly), 35K ($31, or $15.75/$189 yearly), and 50K (about $42/month) with a slider up to 380K words. The free trial is 250 words.

Unused consumer words reset; only the quote-only Business tier advertises non-expiring credits. A money-back line on the pricing page applies if output is still flagged — read the fine print before treating that as a guarantee against every detector.

AI detectors are unreliable in both directions, so a lower score is not proof a human wrote the text, and a high score is not proof they did not.

A concrete walkthrough: clean a 1,200-word blog draft you already wrote

Paste the draft into the detector first. If it flags three sections, humanize only those sections — a 1,200-word full-document pass burns 1,200 of a 10,000-word month.

Re-run the bundled detector and one other (GPTZero or Originality). They will disagree; treat that as normal, not as a reason to buy 35K words.

Then edit the rewrite in your own voice. The 10K plan ($9.99, or $5/month yearly) covers roughly eight drafts this size.

If the goal is a school or client integrity check, stop: a lower detector score is not authorship, and this tool will not make a copied essay yours.

Key features

• Humanizer metered in words per month (10K–380K on published consumer cards)
• Built-in AI detector and Human Auto Typer listed as unlimited on paid plans — the rewrite itself is not
• Writing-level matching and several rewrite strengths
• API access on the published consumer plans
• 250-word free trial; Business is custom with non-expiring credits
• Money-back offer on the pricing page if output is still flagged — terms apply

How to get started

1. Paste a draft or upload a document; run the built-in detector first so you know the starting score
2. Pick a rewrite strength and writing level, then humanize a short sample (the trial is only 250 words)
3. Re-check the output in the bundled detector and at least one third-party detector — they will not agree
4. Edit any sentence that now reads generic or off-voice; do not ship the first pass
5. Buy the 10K plan if a few blog posts a month is the job; jump tiers by word count, not by a 'Pro' feature gate — there is no plan named Pro

Undetectable AI pricing

US prices from undetectable.ai/pricing, September 2026. Trial: 250 words.

10K words is $9.99/month or $60/year. 20K is $19/month or $114/year.

35K is $31/month or $189/year. 50K starts around $42/month; a slider continues to 380K ($209/month on the published config).

Detector and Auto Typer are unlimited; humanized words are not. Consumer unused words do not roll over.

Business is custom.

Our take: Pay for words, not a feature ladder — 10K vs 20K is the same product. Yearly billing halves the sticker if you already know you will use the allowance. Do not buy this to 'beat Turnitin' on school work; detectors are noisy, and a rewrite is still your responsibility. Use it to clean marketing drafts you already intend to edit.

Prices verified 2026-09. Plans change often — confirm on the official site above before you buy.

Use cases

• Softening AI-drafted marketing copy that reads stiff before you publish
• Re-checking a human draft that a detector false-flagged
• API-side rewrite inside a content pipeline that already has a human editor
• Comparing detector scores before and after a rewrite — not as a substitute for original writing

Strengths and tradeoffs

Undetectable AI alternatives

• Humbot: Humbot leans on keeping sentence meaning closer to the original, with less emphasis on a bundled detector.
• StealthGPT: StealthGPT can draft from a blank page, not only rewrite an existing AI dump.
• Originality.ai: Originality is a detector and plagiarism checker, not a humanizer — use it to measure, not to rewrite.
• Grammarly: Grammarly is the better default when the job is clarity and grammar, not detector scores.

Use Undetectable when you already have an AI draft and want a rewrite plus a score in one place. Use Humbot if meaning-preservation matters more than the bundled detector.

Use Originality or GPTZero if you only need to measure. Use Grammarly if the draft is yours and you just need it to read cleanly.

FAQ

Is Undetectable AI free to use?

Undetectable AI's plans: 250-word trial, then monthly word plans from $9.99. Pricing and free-tier limits change over time, so check the official site above for the latest details.

What is Undetectable AI used for?

A word-metered AI humanizer with a bundled detector — not an unlimited rewriter.

Who is Undetectable AI best for?

Undetectable AI is a good fit for softening AI-drafted marketing copy that reads stiff before you publish, or re-checking a human draft that a detector false-flagged.

What are the alternatives to Undetectable AI?

Commonly compared alternatives include Humbot, StealthGPT, and Originality.ai, see the comparison above for how they differ.

How much does Undetectable AI cost?

A 250-word trial is free. Paid humanizing starts at $9.99/month for 10,000 words ($60/year) and steps through 20K / 35K / 50K+ word cards. The detector is unlimited; the rewriter is not. Unused consumer words reset each month.

What's the best Undetectable AI alternative?

Humbot is the most commonly recommended swap: humbot leans on keeping sentence meaning closer to the original, with less emphasis on a bundled detector. Which one is actually best depends on which of those tradeoffs matters more for what you're doing.

Does Undetectable AI have unlimited humanizing?

No. Paid cards list unlimited AI detecting and Human Auto Typer. The rewriter is capped at the plan's monthly word count (10K, 20K, 35K, 50K, or the slider above that). The free trial is 250 words.

Will this make my text pass Turnitin?

No tool can promise that. Detectors disagree with each other and with themselves. Undetectable's pricing page offers money-back if output is still flagged, but that is a refund policy, not a guarantee against every school or publisher detector. Do not use it to submit unoriginal academic work.