Simple, paid plans by word volume
AI humanizer pricing and plans that scale with how much you write
Every plan is sized by the words you humanize each month and includes our AI-pattern score before and after, meaning-preserving rewrites and every tone. Prices in USD. No plan is unlimited, because a rewrite costs us a real model call and we would rather publish a number we can honour.
Starter
Students and light writers
$9/mo
billed $108/yr billed monthly
15,000 words / mo
60 runs / mo
Clear false flags and polish AI-assisted drafts.
- 15,000 words humanized per month
- Across up to 60 runs a month, averaging 250 words a run
- Up to 8 runs in any 24 hours, so one day cannot spend the month
- 1,500 words in a single run, the same on every plan
- Our AI-pattern score, before and after
- Meaning-preserving rewrites
- Every tone: Standard, Academic, Casual, SEO
- Same engine, tones and score as every tier, sized smallest
Pro
Content writers and freelancers
$19/mo
billed $228/yr billed monthly
80,000 words / mo
200 runs / mo
Steady publishing volume across every tone.
- 80,000 words humanized per month
- Across up to 200 runs a month, averaging 400 words a run
- Up to 27 runs in any 24 hours, so one day cannot spend the month
- 1,500 words in a single run, the same on every plan
- Our AI-pattern score, before and after
- Meaning-preserving rewrites
- Every tone: Standard, Academic, Casual, SEO
- Same engine as Starter, with room for a weekly publishing schedule
Scale
SEO teams and agencies
$39/mo
billed $468/yr billed monthly
250,000 words / mo
400 runs / mo
High volume at a price that stays honest.
- 250,000 words humanized per month
- Across up to 400 runs a month, averaging 625 words a run
- Up to 54 runs in any 24 hours, so one day cannot spend the month
- 1,500 words in a single run, the same on every plan
- Our AI-pattern score, before and after
- Meaning-preserving rewrites
- Every tone: Standard, Academic, Casual, SEO
- Same engine as Pro, at agency volume. The most words we sell
Prices in USD. Yearly billing saves 19% to 25% versus paying monthly, depending on the tier. Every plan carries three published ceilings (words a month, runs a month and runs in a day) and all three are enforced. Every button here opens account registration, not a checkout: there is nothing to buy yet.
How much does an AI humanizer cost?
An AI humanizer costs roughly $8 to $20 per month for a normal writing volume, and the honest way to compare plans is cost per 1,000 words rather than the headline price. Undetected.ai starts at $9 per month billed yearly for 15,000 words, which works out at $0.60 per 1,000 words, and drops to $0.24 on the $19 Pro plan with 80,000 words. Across the category, entry plans run from about $5 to $12 per month, and almost all of them buy far fewer words than the headline suggests.
Last updated July 24, 2026. Competitor prices below were read off each vendor's own pricing page on the date shown, in USD.
In context
What 1,000 words actually costs across the category
Entry plans are what people compare, so this table uses each vendor's cheapest paid tier at its annual rate. The per-word column is the number that decides whether a plan is good value at your volume.
| Tool | Cheapest paid plan | Words included | Per 1,000 words | Price checked |
|---|---|---|---|---|
| Undetected.ai (Starter) | $9.00/mo billed yearly | 15,000/mo | $0.60 | July 24, 2026 |
| Undetected.ai (Pro) | $19.00/mo billed yearly | 80,000/mo | $0.24 | July 24, 2026 |
| Undetectable.ai | $5.00/mo billed yearly | 10,000/mo | $0.50 | July 24, 2026 |
| Walter Writes AI | $8.00/mo billed yearly | 30,000/mo, 750 words per request | $0.27 | July 24, 2026 |
| WriteHuman | $12.00/mo billed yearly | 80 requests at up to 600 words | $0.25 if you fill every request | July 24, 2026 |
| QuillBot Premium | $8.33/mo billed yearly | Unlimited paraphrasing, humanizer included | Not metered by word | July 16, 2026 |
We are not the cheapest way in and we do not pretend to be. Undetectable.ai's entry tier undercuts ours by $4 a month, and we broke its full price list down on our Undetectable AI pricing breakdown. What changes above about 20,000 words a month is that our Pro plan lands at $0.24 per 1,000 words while most entry tiers stay near $0.45, so compare at your real monthly volume rather than at the headline.
Good questions
Questions people ask about AI humanizer pricing
How much does an AI humanizer cost per month?
Most paid humanizers cost between $8 and $20 per month on annual billing, and between $12 and $30 if you pay monthly. Our Starter plan is $9 per month billed yearly for 15,000 words, Pro is $19 for 80,000 and Scale is $39 for 250,000. Annual billing across the category is typically close to a half-price offer, which is why the low numbers you see quoted almost always assume a twelve-month commitment.
Is there a free AI humanizer?
Free tiers across the category are small: typically 150 to 300 words as a one-time trial or a few short requests a month. Ours is a free account with 3 runs a day of up to 1,500 words and 9,000 words a month, no card, plus a demo anyone can run twice a day without signing up. It is smaller than the $9 Starter plan on purpose, because every rewrite costs us a real model call. If your budget is genuinely zero and 9,000 words a month is not enough, a competitor's trial will serve you better than we will, and we would rather say so.
How many words per month do I actually need?
Count what you write, not what you might write. A student with two or three assignments a term rarely passes 10,000 words a month. A working freelance writer sits between 20,000 and 40,000. A content team publishing daily clears 80,000 quickly. Buy one tier above your typical month rather than your busiest month, because unused words do not roll over on any plan in this category.
Are AI humanizers worth paying for?
They are worth it when a false AI flag costs you something real: a resubmission, a client relationship, a graded assignment on writing you did yourself. At $9 to $19 a month that is a cheap insurance against a problem detectors create at a measurable rate. They are not worth it if you only need occasional rewriting, where a paraphraser or careful self-editing does the job.
Is yearly or monthly billing better?
Yearly saves 25 percent on Starter, 21 percent on Pro and 19 percent on Scale here, and is close to half price at several competitors, so it wins on cost whenever your need is ongoing. Monthly wins whenever it is not. If you bought a humanizer for one dissertation, one launch or one semester, the annual saving is not a saving, because you are paying for months you will not use.
On every plan
The proof and the quality come standard
No matter which plan you pick, you get the full humanizer: the AI-pattern score, the gauge, every tone and rewrites that keep your meaning.
Our AI-pattern score, before and after
Four measured signals - sentence rhythm, template phrases, vocabulary variety and passive voice - scored on your draft and on the rewrite. It is our own measure, not a GPTZero, Turnitin, Originality.ai, Copyleaks or ZeroGPT result.
The AI-pattern gauge
Watch our score sweep from the number we measured on your draft to the number we measured on the rewrite, with the reasons behind both.
Meaning-preserving rewrites
Your facts, argument and structure stay intact, so the output is natural and still yours.
Every tone
Standard, Academic, Casual and SEO, plus a light-to-strong strength control.
Pricing questions
Quick answers before you pick a plan
Pick a plan and make your writing read like you wrote it
Every plan rewrites your own text and shows our AI-pattern score before and after. Start with the volume that fits how much you publish.
USD · Billed yearly · Cancel anytime