Undetectable AI vs WriteHuman (2026): which should you pick?
As of Nov 13, 2026, Undetectable AI and WriteHuman share a 2.2 GPA, and only WriteHuman has a free plan.
Checked Nov 13, 2026 · graded Nov 13, 2026 by ToolGPA
Undetectable AI grades higher on value for money. WriteHuman grades higher on the free plan. They get the same grade on 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
WriteHuman
AI humanizer with a built-in AI text and image detector
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 WriteHuman if
- Fits if you rewrite short passages and want a detector beside them
- Works for people who want MCP access to a humanizer
Look elsewhere if
- Tight if you stay free: 3 requests a month and 250 words each
- Skip it if you work with long documents, because requests cap at 600 or 1,200 words
- Pricey if you pay monthly: Basic is $20 against $12 on a yearly plan
- Watch out: the API is priced separately from these plans
How we grade them
| 2.2GPAUndetectable AIFair | 2.2GPAWriteHumanFair | |
|---|---|---|
| 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$12 a month billed annually ($20 monthly) for Basic, at the category's dearer-quarter mark. |
| Free plan and trial | DA free trial capped at 250 words, and the listing doesn't say whether a card is needed. | C3 humanizer requests a month of up to 250 words, 10 detection checks and 10 image scans. Few people stay under that. |
| Features | CHumanizer, detector, writing tools and a refund if flagged. It covers the job, with a word budget attached. | CHumanizer, text and image detection, a Chrome extension, API and MCP. Word limits of 600 on Basic and 1,200 on Pro split long documents. |
| Ease of use | CNo store rating on record. Pasting text in is quick, but results need checking. | CNo store rating on record. Paste and run, but with output variations and limits to learn. |
| Platforms and integrations | BWeb and a Chrome extension, with an API. | BWeb and a Chrome extension, with an API and MCP access. |
| Best for | rewriting text so it passes AI detectors | humanizing AI text with a built-in detector |
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 WriteHuman. 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. WriteHuman starts at $12 a month and scores 2.3.
They score the same, and Undetectable AI starts $7 a month lower. Of the other writing tools on the chart, 13 score higher than Undetectable AI for less, and 30 score higher than WriteHuman 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.
At a glance
| Undetectable AI | WriteHuman | |
|---|---|---|
| Pricing | Free trial | Free plan |
| Starts at | $5 per month for 10K words, billed annually ($9.99 billed monthly) | $12 per month, billed annually ($20 billed monthly) |
| Free plan | None | 3 humanizer requests a month of up to 250 words, 1 output variation, 10 detection checks and 10 image scans, on the basic humanization model. |
| Free trial | Free trial limited to 250 words; more use needs a paid plan | None listed |
| Web | ||
| Browser extension | ||
| Made by | Undetectable Inc. | WriteHuman |
| Price read from | undetectable.ai | writehuman.ai |
| 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.
WriteHuman
- The free plan allows 3 requests a month and a maximum of 250 words per request.
- Each request has a word limit of 600 on Basic and 1,200 on Pro, so long documents are split.
- Annual billing is shown as the headline price; month-to-month Basic is $20.
- API access has its own word-based pricing page and is not part of these plans.
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.
WriteHuman
- AI humanizer
- Rewrites AI text into several output variations per request, with a basic model on the free plan and an enhanced one on paid plans.
- AI text detector
- Checks whether text looks machine-written. Monthly check counts run from 10 on Free to unlimited on Ultra.
- Image detector
- Scans images for AI generation, with 10 scans a month on Free and unlimited on Ultra.
- Chrome extension
- The site lists an extension for humanizing and fixing writing in any browser tab.
- API and MCP
- A REST endpoint to humanize and detect text is sold separately with word-based pricing, and an MCP connection is included from Pro.
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.
WriteHuman
Free$0
3 humanizer requests a month, up to 250 words each, 10 detection checks and 10 image scans.
Basic$12
per month, billed annually ($20 billed monthly)
80 requests a month, up to 600 words each, 2 output variations, enhanced model, 160 detection checks and 80 image scans. Billed $144 a year.
Pro$19
per month, billed annually ($29 billed monthly)
200 requests a month, up to 1,200 words each, 3 output variations, 400 detection checks, MCP access and priority support. Billed $228 a year.
Ultra$39
per month, billed annually ($59 billed monthly)
Unlimited requests, up to 3,000 words each, 5 output variations, unlimited detection checks and image scans, and 1,000 MCP requests a month. Billed $468 a year.
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.
WriteHuman
- Annual discount
Yearly billing saves up to $240 a year
The pricing page shows yearly billing as four months free, for example $144 a year on Basic against $240 billed monthly.
Common questions
Which is cheaper, Undetectable AI or WriteHuman?
As of Nov 13, 2026, Undetectable AI is cheaper to start with: $5 a month, against $12 a month for WriteHuman. Undetectable AI starts at $5 per month for 10K words, billed annually ($9.99 billed monthly), and WriteHuman starts at $12 per month, billed annually ($20 billed monthly).
Which has a free plan, Undetectable AI or WriteHuman?
As of Nov 13, 2026, only WriteHuman has a free plan. Undetectable AI does not, though it has a free trial.
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.