Undetectable AI review: our take
Undetectable AI does two opposite jobs from one account. It scores text sentence by sentence for signs of AI generation, and it rewrites AI text until detectors score it as human. Around those sit a paraphraser, an SEO writer, a plagiarism checker and detectors for AI images, audio, video and fake PDFs. Plans are sold by the word: 10,000 a month cost $9.99, or $60 a year, and the slider runs to 380,000.
It researches nothing and supplies no keyword or ranking data, so a publisher who needs original, checked writing gets back a rewrite of whatever went in. For the narrower question of whether a text was copied, Copyscape charges 3 cents a search with no subscription required.
What Undetectable AI does
Undetectable AI checks text for signs of AI generation sentence by sentence and rewrites AI-written text so it scores as human on AI detectors. The suite also includes a paraphraser, an AI SEO content writer, a plagiarism checker and detectors for AI images, audio, video and fake PDFs. Plans are sold by monthly word allowance, with a Chrome extension and API.
Who Undetectable AI is for
Best for
- writers checking whether drafts read as AI-generated
- content teams editing AI-assisted drafts
Not for
- SEO research (no keyword, ranking or link data)
- publishers who need original, fact-checked writing (it rewrites, it does not research)
Undetectable AI features
- F1AI Detector
- F2AI Humanizer
- F3Paraphrasing tool
- F4AI SEO Content Writer
- F5AI Plagiarism Checker
- F6AI image, audio and video detectors
- F7Chrome extension
- F8API
Undetectable AI pricing and plans (2026)
| Plan | Monthly | Billed yearly, per month | What it includes |
|---|---|---|---|
| 10K words | $9.99 | $5 | 10,000 words/month; $60.00 charged annually |
| 20K words | $19 | $9.50 | 20,000 words/month; $114.00 charged annually |
| 35K words | $31 | $15.75 | 35,000 words/month; $189.00 charged annually |
| 50K words | $42.50 | $21.25 | 50,000 words/month (slider up to 380,000) |
| Business | — | — | custom pricing, non-expiring credits, white labeling |
Free plan: no. Prices as listed by the vendor, before tax; they change, so check the pricing page before you buy.
Undetectable AI interface
Undetectable AI FAQ
- How much does Undetectable AI cost?
- Paid plans start at $9.99/mo, with a discount for yearly billing. Prices checked on 1 Oct 2026.
- Does Undetectable AI have a free plan?
- No, Undetectable AI has no free plan.
- What are the alternatives to Undetectable AI?
- Tools that cover the same jobs include Yahini, Grubby AI, Prepostseo, Jasper.