Humanizer pricing · checked Oct 8, 2026

Undetectable AI pricing

Undetectable AI costs $19 a month on its cheapest monthly plan (20K words/month), or $9.50 a month billed yearly ($114). The lowest price overall is $5 a month on a yearly-only plan (10K words/month; yearly only (no 10K tier in the Monthly view)), paid $60 up front. Free option: Free trial limited to 250 words.

By the HumanizerNerd desk · Prices from undetectable.ai, read Oct 8, 2026

Every Undetectable AI plan

10K words

$5/mo yearly

10K words/month; yearly only (no 10K tier in the Monthly view)

20K words

$19

or $9.50/mo billed yearly ($114)

20K words/month

$0.95 per 1,000 words · $0.48 yearly

35K words

$31

or $15.75/mo billed yearly ($189)

35K words/month

$0.89 per 1,000 words · $0.45 yearly

50K words

$42

or $21.25/mo billed yearly

50K words/month; yearly card has a slider from 50,000 to 380,000 words

$0.84 per 1,000 words · $0.43 yearly

80K words

$64

billed monthly

80K words/month; monthly card has a slider from 80,000 to Unlimited

$0.80 per 1,000 words

For Business

Custom

custom pricing, non-expiring credits

Highlighted: the plan with the lowest cost per 1,000 words on monthly billing. "Per 1,000 words" divides the monthly price by the monthly word allowance, assuming you use all of it.

Free tierFree trial limited to 250 words

RefundsNo refunds unless required by law; word credits may be refunded if a submission provably scores under 75% human on a reputable detector, claimed within 30 days. Pricing page headline: "Money-back guarantee if output flagged is not human". (their terms)

CancellingTerms: California and New York residents cancel in the account dashboard; everyone else cancels by emailing support. Remaining words are lost on cancel; prior periods are not refunded.

Trial: Monthly view says yearly plans can be tried free for 3 days ("No charge today"); free trial limited to 250 words.

Visit Undetectable AI Compare all prices

How we got these numbers

We read Undetectable AI's own pricing page on Oct 8, 2026 and kept a dated screenshot. Prices here are exactly what that page showed, never figures from app-store purchase lists or other review sites. A script re-reads the page every morning; when something changes we update this page and note it in the price change log.

Word allowances are the vendor's own numbers. We haven't yet measured how many words each plan really lets you process; that comes with our free-tier test in November 2026. How we test.

No company paid for this page, and we don't earn anything if you click through to Undetectable AI.