What Undetectable AI does
Undetectable AI is a web toolkit built around two jobs: checking whether text looks AI-written, and rewriting AI-generated text so it reads more like a person wrote it. Around that core it adds a paraphraser, essay writer, plagiarism checker, SEO writer and detectors for images, audio, deepfakes and fake documents. Plans are sold by monthly word allowance, with AI detection unlimited on every paid tier, and a Chrome extension works inside Google Docs and Gmail.
Best for
- Writers rewriting AI drafts to sound more natural
- Checking text for likely AI authorship
- Bloggers and marketers producing high word counts
- Businesses needing white-label or API access
Key features
AI humanizer
Rewrites AI-generated text to read more like human writing, with options to match a target writing level.
AI detector
Scores text for likely AI authorship; detection is unlimited on paid plans.
Media and document checks
Separate detectors look at images, audio, video deepfakes and fake PDFs, receipts and IDs.
Writing tools
Includes a paraphraser, essay writer, plagiarism checker and SEO writer in the same account.
Human Auto Typer
Types text into a document gradually, and is unlimited on all paid plans.
Chrome extension and API
The extension works on any web page including Google Docs and Gmail; an API is offered for developers.
Undetectable AI pricing
Undetectable AI has a free plan. You can try the core tools free; the free trial for humanizing is limited to 250 words. Paid plans start at $9.99/month. Free trial limited to 250 words. The site offers a refund of the humanization cost if output is flagged as not human; see its help section for terms. Prices checked on the official site on Nov 9, 2026.
| 10K words | $9.99/month | $5.00/month billed annually ($60/year) |
|---|---|---|
| 20K words | $19.00/month | $9.50/month billed annually ($114/year) |
| 35K words | $31.00/month | $15.75/month billed annually ($189/year) |
| 50K words | $42.50/month | $21.25/month billed annually |
| Business | Contact sales | Custom quote; non-expiring credits, white labeling |
Source: Undetectable AI pricing page
Pros and cons
What it does well
- Annual billing halves the monthly price on every word tier.
- AI detection and the auto typer are unlimited on all paid plans.
- Many writing and verification tools come under one subscription.
Know before you sign up
- Paid plans cap humanized output by words per month, starting at 10,000.
- The free trial covers only 250 words of humanizing.
- No mobile app is mentioned on the official site.
Alternatives to Undetectable AI
Originality.aiScreen text for possible AI generation.
GPTZeroReview writing for possible AI-generated text.
CopyleaksCheck text for possible AI generation.
DeepLTranslate text and documents across languages.
Hemingway EditorSpot readability issues and revise prose.
ProWritingAidPlan and edit stories with writer-focused feedback.
Questions about Undetectable AI
What is Undetectable AI?
Undetectable AI is a web toolkit built around two jobs: checking whether text looks AI-written, and rewriting AI-generated text so it reads more like a person wrote it. Around that core it adds a paraphraser, essay writer, plagiarism checker, SEO writer and detectors for images, audio, deepfakes and fake documents. Plans are sold by monthly word allowance, with AI detection unlimited on every paid tier, and a Chrome extension works inside Google Docs and Gmail.
Is Undetectable AI free?
Undetectable AI has a free plan. You can try the core tools free; the free trial for humanizing is limited to 250 words. Paid plans start at $9.99/month. Free trial limited to 250 words. The site offers a refund of the humanization cost if output is flagged as not human; see its help section for terms. Prices checked on the official site on Nov 9, 2026.
How much does Undetectable AI cost?
Paid plans start at $9.99/month; plans listed on the official pricing page: 10K words ($9.99/month), 20K words ($19.00/month), 35K words ($31.00/month), 50K words ($42.50/month), Business. The site offers a refund of the humanization cost if output is flagged as not human; see its help section for terms.
Who is Undetectable AI best for?
Writers rewriting AI drafts to sound more natural, Checking text for likely AI authorship, Bloggers and marketers producing high word counts and Businesses needing white-label or API access.
Where can I use Undetectable AI?
Undetectable AI is available on Web, Chrome extension and API, according to its official site.
What are some alternatives to Undetectable AI?
Similar writing tools include Originality.ai, GPTZero, Copyleaks and DeepL. Compare them on the Writing page.