Undetectable AI vs WordAi (2026): which should you pick?
As of Nov 13, 2026, Undetectable AI grades higher than WordAi: 2.2 against 2.0 out of 4.0.
Checked Nov 13, 2026 · graded Nov 13, 2026 by ToolGPA
Undetectable AI grades higher on value for money. They get the same grade on the free plan, features, ease of use and platforms.
Price, platforms and features side by side. The table says where each price was read and when.
Undetectable AI
AI humanizer and AI detector sold by monthly word allowance
Which one is for you
Pick Undetectable AI if
- Fits if you need to rewrite short pieces and have a small word budget
- Works for people who also want a detector alongside
Look elsewhere if
- 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
Pick WordAi if
- Fits if you rewrite lots of articles at once
- Works for people who want an API for bulk rewrites
Look elsewhere if
- Tight if you want to test: 3 days and no free plan
- Skip it if you want the detection pass on everything, since it caps at 25,000 words on Starter
- Watch out: the 30-day money-back guarantee only applies if fewer than 10 articles were rewritten
- Not for you if you want an app or extension, because none is listed
How we grade them
| 2.2GPAUndetectable AIFair | 2.0GPAWordAiFair | |
|---|---|---|
| Value for money | B$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. | C$9 a month billed annually ($17 monthly) for 50,000 rewrite words, near the category's $9.75 middle. |
| Free plan and trial | DA free trial capped at 250 words, and the listing doesn't say whether a card is needed. | DA 3-day free trial, shorter than a week, and no free plan. |
| Features | CHumanizer, detector, writing tools and a refund if flagged. It covers the job, with a word budget attached. | CSentence-level rewriting, many variations, bulk rewrite, API and an AI-detection pass. It does that job fully, and it's a narrow one. |
| Ease of use | CNo store rating on record. Pasting text in is quick, but results need checking. | CNo store rating on record. A web tool with settings and variations to learn. |
| Platforms and integrations | BWeb and a Chrome extension, with an API. | BWeb only, but with an API and an Article Forge import. |
| Best for | rewriting text so it passes AI detectors | rewriting articles in bulk |
The GPA is the average of the five grades: an A is 4 points, an F is none. The full reasons are on each tool's page: Undetectable AI and WordAi. How we grade
Price against what you get
Undetectable AI starts at $5 a month and scores 2.3 out of 4 on features, ease of use and platforms. WordAi starts at $9 a month and scores 2.3.
They score the same, and Undetectable AI starts $4 a month lower. Of the other writing tools on the chart, 13 score higher than Undetectable AI for less, and 26 score higher than WordAi for less.
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
Where they differ
- Undetectable AI also covers documents.
- WordAi also covers long-form writing.
At a glance
| Undetectable AI | WordAi | |
|---|---|---|
| Pricing | Free trial | Free trial |
| Starts at | $5 per month for 10K words, billed annually ($9.99 billed monthly) | $9 per month, billed annually ($17 billed monthly) |
| Free plan | None | None |
| Free trial | Free trial limited to 250 words; more use needs a paid plan | 3-day free trial |
| Web | ||
| Browser extension | ||
| Made by | Undetectable Inc. | Glimpse.ai |
| Price read from | undetectable.ai | wordai.com |
| Checked | Nov 13, 2026 | Nov 13, 2026 |
Worth knowing
Undetectable AI
- 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.
WordAi
- The AI-detection pass has its own smaller monthly cap: 25,000 words on Starter and 250,000 on Power.
- The page says nothing about a free plan; the trial lasts 3 days.
- The 30-day money-back guarantee applies only if fewer than 10 articles were rewritten.
- No apps or extensions are listed; it is used in the browser.
Key features
Undetectable AI
- 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.
WordAi
- Sentence-level rewriting
- Restructures each sentence while keeping its meaning, with a slider between conservative and more adventurous rewrites.
- Many variations
- Creates from 1 to 1,000 rewrites of a single article.
- Bulk rewrite and export
- Upload many articles at once and download rewrites in bulk or as spintax.
- AI-detection pass
- A rewrite mode aimed at passing AI detectors, with its own monthly word cap on each plan.
- API and HTML support
- Rewrites HTML content, shows code view, and exposes an API for adding rewriting to a workflow.
- Article Forge import
- Imports articles generated by Article Forge so they can be rewritten.
Plans
Undetectable AI
10K words$5
per 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$9.50
per month for 20,000 words, billed annually ($19 billed monthly)
20,000 words a month, charged $114 a year.
35K words$15.75
per month for 35,000 words, billed annually ($31 billed monthly)
35,000 words a month, charged $189 a year.
50K words$21.25
per 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.
WordAi
Starter$9
per month, billed annually ($17 billed monthly)
50,000 rewrite words a month, of which 25,000 can be run through the AI-detection pass. Bulk rewriting and API access included.
Power$27
per month, billed annually ($57 billed monthly)
3,000,000 rewrite words a month, of which 250,000 can be run through the AI-detection pass.
EnterpriseCustom
Custom word volumes with white-labeled integration, multiple user accounts and an account manager, arranged by contacting the vendor.
Ways to pay less
Undetectable AI
- Annual discount
Yearly 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.
WordAi
- Annual discount
Save 47% with yearly billing
The pricing page offers yearly billing at 47% below monthly, shown as $9 against $17 a month on Starter.
Common questions
Which is cheaper, Undetectable AI or WordAi?
As of Nov 13, 2026, Undetectable AI is cheaper to start with: $5 a month, against $9 a month for WordAi. Undetectable AI starts at $5 per month for 10K words, billed annually ($9.99 billed monthly), and WordAi starts at $9 per month, billed annually ($17 billed monthly).
Which has a free plan, Undetectable AI or WordAi?
As of Nov 13, 2026, neither Undetectable AI nor WordAi has a free plan. Both have a free trial.
Which platforms do Undetectable AI and WordAi run on?
As of Nov 13, 2026, only Undetectable AI lists a browser extension. Both list a web app. A platform missing from a listing is one its maker's pages did not mention.
More comparisons
How this page was made
- The verdict at the top follows a fixed rule. When both tools are in the same category and either is in our top three for it, the verdict follows that ranking: the higher-placed tool is our pick. The top three weigh who each tool suits as well as its grades, so a pick can go against the GPA. Otherwise the page does not pick one and says which grades higher: the higher GPA first; on a tie, the one with a free plan, then the one that starts cheaper in dollars a month, counted the same way for both; if they are still level, what the choice depends on.
- The grades are our own, from each tool’s review or report card. The GPA is their average.
- Prices, plans and platforms come from each tool’s listing. The table above says where each price was read and when.
- The differences and the answers to the questions are worked out from those listings.