Undetectable AI review: Detects AI text and images and rewrites text to read as human; Chrome extension included
Detects AI text and images and rewrites text to read as human; Chrome extension included
Starts at $9.99/mo, free plan: yes, free trial: Free trial limited to 250 words, prices checked on November 2, 2026.
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What Undetectable AI does
Undetectable AI is a platform that groups several tools for working with AI-assisted writing. Its AI Detector scans pasted or uploaded text and shows which sentences are likely to be flagged as AI-generated. The AI Humanizer then rewrites those passages by varying sentence structure, vocabulary and tone. A separate AI Image Detector checks whether a picture was made by AI. The site also lists a paraphrasing tool, essay writer, plagiarism checker, human typer and job applier.
A Chrome extension brings detection and rewriting into places like Google Docs and Gmail. The vendor says the product is meant for students, educators, professionals, content writers and business owners. Its tools support 50+ languages, with English giving the highest accuracy.
On pricing, you can start free with the core tools, and the free trial is limited to 250 words. Paid plans are sized by monthly word allowance: 10K words/month costs $9.99 per month billed monthly or $5.00 per month billed yearly; 20K words/month costs $19.00 or $9.50; 35K words/month costs $31.00 or $15.75; and 50K words/month costs $42.50 or $21.25. Businesses can contact the vendor for custom pricing with non-expiring credits.
- AI text detection with sentence-level flags
- AI Humanizer that rewrites text
- AI Image Detector
- Chrome extension for Google Docs and Gmail
- 50+ language support
- Human Auto Typer
- Custom business plans with non-expiring credits
- Refund if output is flagged as not human
Pros and cons
Pros
- Combines AI text detection, humanizing and image detection in one platform
- Chrome extension covers Google Docs, Gmail and other web pages
- Supports 50+ languages, though English is the most accurate
- Paid plans include unlimited AI detecting and Human Auto Typer
- Vendor offers a refund of the humanization cost if output is flagged as not human
Cons
- Free trial is limited to 250 words
- Paid plans are capped by monthly words, from 10K to 50K
- Plans have no names on the pricing page, only word allowances
- Lowest prices of $5.00 to $21.25 per month require yearly billing
- Accuracy is highest only in English, per the vendor
Our take
Undetectable AI suits people who want detection and rewriting of text in one place, such as students, writers and marketers who already check drafts for AI flags. The tiers are priced by word allowance, so the price depends on how much text you process each month. It fits less well if you need a generous free tier, since the trial stops at 250 words, or if you need clear platform details beyond the web tools and Chrome extension. Check the refund terms on the vendor's Help page before relying on them.
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Undetectable AI pricing
| Plan | Monthly billing | Annual billing (per month) | Limits / what’s included |
|---|---|---|---|
| 10K words/month plan per month | $9.99 | $5 | 10K words/month; charged annually $60.00 |
| 20K words/month plan per month | $19 | $9.50 | 20K words/month; charged annually $114.00 |
| 35K words/month plan per month | $31 | $15.75 | 35K words/month; charged annually $189.00 |
| 50K words/month plan per month | $42.50 | $21.25 | 50K words/month |
Free trial: Free trial limited to 250 words. Free plan: yes.
Prices checked on on the official Undetectable AI pricing page. “—” = not published.
All Undetectable AI plans, limits and annual prices →
Frequently asked questions
Is Undetectable AI free?
You can start for free and try the core tools. The free trial is limited to 250 words, and more usage needs a paid plan.
How much do paid plans cost?
The 10K words/month plan is $9.99 per month billed monthly or $5.00 per month billed yearly. The 20K plan is $19.00 or $9.50, the 35K plan $31.00 or $15.75, and the 50K plan $42.50 or $21.25.
Can I use it in my browser?
Yes. The Chrome extension lets you detect and humanize content in places like Google Docs and Gmail.
Does it support languages other than English?
Yes, the vendor says its tools support 50+ languages, with English offering the highest accuracy.
Is there an API?
The pricing page lists plans as API compatible, and the site links to an API page.
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