Undetectable AI review (2026): is it worth $5 a month, billed yearly?
AI humanizer and AI detector sold by monthly word allowance
Black Friday: is there a Undetectable AI sale?
Undetectable AI report card
Fair · out of 4.0 · graded Nov 13, 2026
Best for rewriting text so it passes AI detectors
Undetectable AI is a humanizer and detector sold by monthly word allowance, from $5 a month on annual billing. The trial stops at 250 words, month-to-month the first plan is $9.99, and heavy users move up tiers fast.
Who Undetectable AI is for
- Fits if you need to rewrite short pieces and have a small word budget
- Works for people who also want a detector alongside
Who Undetectable AI is not for
- Tight if you try it first: the trial is 250 words
- Pricey if you write a lot, because plans are measured in words a month
- Watch out: $5 is the yearly rate; month-to-month the first plan is $9.99
- Watch out: non-expiring credits and white labelling are on the custom business plan only
Why Undetectable AI gets a 2.2
Five grades, each with its reason. The GPA is their average: an A is 4 points, an F is none.
- BValue for money$5 a month billed annually for 10,000 words, inside the category's cheapest quarter at $5.75. Month-to-month it's $9.99, around the middle.
- DFree plan and trialA free trial capped at 250 words, and the listing doesn't say whether a card is needed.
- CFeaturesHumanizer, detector, writing tools and a refund if flagged. It covers the job, with a word budget attached.
- CEase of useNo store rating on record. Pasting text in is quick, but results need checking.
- BPlatforms and integrationsWeb and a Chrome extension, with an API.
What these grades rest on. Graded from this listing, whose facts were read from Undetectable AI's own pages on 13 November 2026. Not based on using the product, and shorter than our full reviews. How we review and grade.
Make Undetectable AI? Put this grade on your site
Paste this where you want the badge. It links here and follows the grade if it changes. About badges
<a href="https://toolgpa.com/tools/undetectable-ai#review"><img src="https://toolgpa.com/badge/undetectable-ai.svg" alt="Undetectable AI: 2.2 GPA on ToolGPA" width="196" height="56"></a>Where Undetectable AI stands among writing tools
Undetectable AI's GPA of 2.2 is higher than 35 of the 136 other writing tools we grade, and level with 23.
It stands best on value for money (B, above 73 of 136) and worst on free plan and trial (D, above 12).
Its paid plans start at $5 a month, against a middle price of $8.66 for the category: 14 of the 81 others that charge start lower.
On features, ease of use and platforms it scores 2.3 out of 4. 13 tools score higher and cost less.
Each grade against the category
Every bar is all 137 writing tools we grade, cut by the letter each got. Undetectable AI’s own letter is outlined.
- BValue for moneyAbove 73 of 136, level with 15
- DFree plan and trialAbove 12 of 136, level with 6
- CFeaturesAbove 2 of 136, level with 91
- CEase of useAbove 7 of 136, level with 81
- BPlatforms and integrationsAbove 71 of 136, level with 56
Price against what you get
Each dot is one of 107 writing tools. Further left costs less, and higher up scores better on features, ease of use and platforms. Point at a dot to see which tool it is.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
Keep Undetectable AI, or make your own?
Your call
A writing app at its plainest is a page that saves what you type.
You could make the core of Undetectable AI for yourself: documents. What you would give up is listed below. Whether that is worth the price is your call. It costs $60 a year.
What you could make
- Documents: an app builder makes this well.
- It runs in a browser, which is where something home-made would run too.
What you could not
- An API that other software can build on.
- AI features, unless you pay a model provider for each request yourself.
What this rests on. Undetectable AI’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.
What is Undetectable AI?
Undetectable AI rewrites machine-written text so that AI detectors are less likely to flag it, and also offers its own AI detector. The site sells monthly word allowances, with a yearly billing option at half the monthly price. It also lists detectors for images, voice, video and documents.
Worth knowing
- The free trial is capped at 250 words.
- Plans are measured in words per month, so heavy users move to the larger tiers quickly.
- The $5 figure is the yearly-billing rate with a crossed-out $9.99; month-to-month the first plan is $9.99.
- Non-expiring credits and white labeling are offered only on the custom business plan.
Key features
- AI humanizer
- Rewrites AI-generated text with the aim of passing AI detectors, with writing-level matching.
- AI detector
- Paid plans list unlimited AI detecting. Separate detectors exist for images, voice, video, deepfakes and fake PDFs, receipts and IDs.
- Writing tools
- The site also lists an essay writer, stealth writer, paraphrasing tool, SEO content writer, plagiarism checker and a human auto-typer.
- Refund if flagged
- The pricing page says the cost of a humanization is refunded if the output is flagged as not human; details are on the Help pages.
- API and Chrome extension
- Plans are marked API compatible, and the site lists a Chrome extension.
Undetectable AI pricing
As of Nov 13, 2026, Undetectable AI is a paid product with a free trial, starting at $5 per month for 10K words, billed annually ($9.99 billed monthly).
- Starts at
- $5 per month for 10K words, billed annually ($9.99 billed monthly)
- Free plan
- None
- Free trial
- Free trial limited to 250 words; more use needs a paid plan
| Plan | Price | What you get |
|---|---|---|
| 10K words | $5per month for 10,000 words, billed annually ($9.99 billed monthly) | 10,000 words a month, charged $60 a year. The page crosses out $9.99 and marks yearly billing as 50% off. |
| 20K words | $9.50per month for 20,000 words, billed annually ($19 billed monthly) | 20,000 words a month, charged $114 a year. |
| 35K words | $15.75per month for 35,000 words, billed annually ($31 billed monthly) | 35,000 words a month, charged $189 a year. |
| 50K words | $21.25per month for 50,000 words, billed annually ($42.50 billed monthly) | 50,000 words a month. Larger allowances up to 380,000 words are listed, with custom pricing on request. |
Read from undetectable.ai on Nov 13, 2026. Prices change, so confirm with Undetectable AI before you buy.
Ways to pay less
- Annual discountYearly billing at half the monthly price
The pricing page marks yearly billing as 50% off the monthly rate, for example $60 a year for 10,000 words a month.
Stated on undetectable.ai
Undetectable AI alternatives
- Undetectable AI vs WriteHuman
Free plan · from $12/mo
- Undetectable AI vs QuillBot
Free plan · from $8.33/mo
- Undetectable AI vs GPTZero
Free plan
- Undetectable AI vs Winston AI
Free trial · from $10/mo
Common questions
Does Undetectable AI have an Android app?
No Android app was listed when its pages were read on Nov 13, 2026. Undetectable AI is listed for Web.
Does Undetectable AI have an iPhone app?
No iPhone app was listed when its pages were read on Nov 13, 2026. Undetectable AI is listed for Web.
Is Undetectable AI open source?
Undetectable AI is not described as open source on its own site, as read on Nov 13, 2026.
Does Undetectable AI have an API?
Yes. Undetectable AI offers a public API, according to its own site.
Sources for this page
The prices, plans, platforms and features above were read from these pages on Nov 13, 2026.