Head to head · Undetectable AI
Undetectable AI vs Undetected AI and which humanizer fits your workload
The short answer
Undetectable AI and Undetected AI are separate products from separate companies, despite the near-identical names. Undetectable.ai is the more established brand with a bigger feature menu and a 250-word free trial. Undetectable.ai is also cheaper to start: $5 a month billed yearly against our $24. Undetected.ai gives you far more words per dollar (100,000 vs 10,000 on the entry plans, $0.24 against $0.50 per 1,000 words), a 1,000,000-word tier at $99 a month billed yearly that reaches past the 50,000-word ceiling where Undetectable.ai moves to a Business quote, and a gauge that shows our own AI-pattern score before and after with the reasons behind it. Neither company can show you a GPTZero or Turnitin verdict, and we say so.
Pricing read off each vendor's own page
Meaning kept · Your own text rewritten · Saved to your history, delete any time
First, the confusion worth clearing up: Undetectable AI (undetectable.ai) and Undetected AI (undetected.ai) are two different tools from two different companies. If you meant to find the other one, no hard feelings. If you are comparing them on purpose, this page puts the real numbers side by side.
Both rewrite AI-generated text so it reads as human to detectors like GPTZero, Turnitin, Originality.ai, Copyleaks, and ZeroGPT. The differences that matter are words per dollar, what proof you get that the rewrite worked, and whether there is a ceiling on how much you can humanize in a month.
Verified pricing
Undetectable AI vs Undetected.ai pricing
Undetectable.ai prices re-read first-party off undetectable.ai/pricing on September 8, 2026, and unchanged from the July reading. Plans change, so check their page for the latest.
| Plan level | Undetected.ai | Undetectable AI |
|---|---|---|
| Entry plan | Starter: 100,000 words/mo at $24/mo billed yearly ($49 monthly) | 10,000 words/mo at $5/mo billed yearly ($9.99 monthly) |
| Mid plan | Pro: 300,000 words/mo at $49/mo billed yearly ($99 monthly) | 20,000 words/mo at $9.50/mo billed yearly ($19 monthly) |
| Top plan | Scale: 1,000,000 words/mo at $99/mo billed yearly ($199 monthly) | 50,000 words/mo at $21.25/mo billed yearly ($42.50 monthly); above that, Business volume is quoted individually |
| Trial | Trial: 3 runs of up to 300 words, once. No free plan.; the on-page demo runs twice a day with no account | 250-word free trial |
| API | None. Browser only, and no date announced for one | Advertised as compatible on paid plans |
Prices change and promos expire. Always confirm on each vendor's pricing page before buying.
Side by side
What each tool actually does
A fair look at where each one wins. Both are capable humanizers; the fit depends on your volume and workflow.
| What matters | Undetected.ai | Undetectable AI |
|---|---|---|
| Words per dollar, entry plan | 100,000 words for $24/mo yearly: 4,167 words per dollar | 10,000 words for $5/mo yearly: 2,000 per dollar, but the pool caps sooner |
| Heavy monthly volume | 1,000,000 words/mo at $99/mo yearly | Tops out at 50,000 words/mo published, then a Business quote |
| What you see after the rewrite | Our AI-pattern score before and after, with the reasons behind it | Returns humanized text and a detection status |
| What one pass does | Rewrites the properties these tools measure, and shows our own score before and after. No claim about their verdicts | Markets broad multi-detector coverage |
| Extra tools | Focused on the humanizing job | Larger menu: detector, watermark tools, writing-level matching |
| Best suited for | Writers and teams with real monthly volume who want visible proof | Occasional users who want an established brand and a free trial |
Pricing, cheaper to start against cheaper per word
On headline price, Undetectable.ai wins clearly: $5 a month billed yearly is about as cheap as this category gets, and our Starter costs almost five times that. But their entry pool is 10,000 words, and a single humanized blog post can eat 1,200 of them. If you publish twice a week, you will hit that cap by the third week and be shopping for the next tier.
Undetected.ai's Starter plan costs $24 a month billed yearly and carries 100,000 words, ten times their entry pool, which works out at $0.24 per 1,000 words against their $0.50. Pro is 300,000 words for $49, where their $15.75 tier buys 35,000. Past that, the math stops being close. Undetectable.ai publishes tiers up to 50,000 words and sends anything above that to a Business quote; Undetected.ai publishes 1,000,000 words for a flat $99 a month billed yearly, about $0.10 per 1,000 words. For an agency or content team, a published number is the difference between budgeting and negotiating.
A status message against a gauge you can watch
We have no access to GPTZero, Turnitin, Originality.ai, Copyleaks or ZeroGPT, so we cannot show you their verdicts and will not imply we can. Undetectable.ai markets its rewrites against those names; we do not.
Undetectable.ai returns your humanized text with a detection status. Undetected.ai puts a gauge on screen that moves from our AI-pattern score for your draft to the score for the rewrite, and names the reasons behind both. That does not change the rewrite quality by itself, but it changes your workflow: you stop copying output into GPTZero to double-check, because the check is already in front of you.
Where Undetectable AI is genuinely the better pick
An honest comparison cuts both ways. Undetectable.ai has been in the category longer, has a bigger public footprint, and bundles more side tools: an AI detector, watermark removal, writing-level matching. If you want one subscription that includes a detector you can run on other people's text, that bundle has real value.
The 250-word free trial also means you can test their output quality on your own writing before paying, which we think every buyer should do with every humanizer, including ours.
The honest split
Who should pick which
Pick Undetected.ai if
- You humanize well over 10,000 words a month and care about cost per word more than the entry price
- You want to read what the rewrite changed before you check the output in GPTZero yourself
- You may grow past 50,000 words a month and want a published flat price for it
Pick Undetectable AI if
- You humanize occasionally, the 10,000-word entry pool is genuinely enough, and you want the lowest monthly bill
- You want a bundled AI detector and watermark tools in the same subscription
- You want to trial on 250 words before paying anything
No tool wins every workload. Test both on your own text before committing to a year.
Good questions
Undetectable AI vs Undetected.ai, answered
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Further reading: Why writers switch from Undetectable.ai · Undetectable AI pricing, tier by tier · Is Undetectable AI legit? The review split, the guarantee and the Forbes badge · AI Undetect review: the third similarly named company, priced · Do AI humanizers actually work? What testing shows
Try Undetected.ai on your own text
Paste your own text and read the rewrite next to the original, with our AI-pattern score measured on both before you copy.
Comparing on cost alone? We broke every tier down, with the real price per 1,000 words, on our Undetectable AI pricing breakdown.
Meaning kept · Your own text rewritten · Saved to your history, delete any time