Free
See the difference for yourself
$0 /month
- 150 words per month
- Preview the first 150 words of every result
- AI Humanizer
- Paraphraser
- AI Detector
- Citation Generator
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Choose a plan that fits you.
Humanize, paraphrase, check for AI, and improve your writing — all in one place.
Better writingClearer, more natural drafts
Your privacy, respectedWe don’t sell your personal data
Built for studentsOne word pool for every tool
Cancel anytimeNo long-term commitmentBilling period
Save up to 58%
See the difference for yourself
$0 /month
Perfect for students
$7.99 /month
Everything in Free, plus:
For high-quality, high-volume writing
$19.99 /month
Everything in Student, plus:
“Kinzo AI has genuinely made my writing so much easier. It’s like having a personal writing coach.”
Every plan includes all four tools. The difference is how many words you can run each month and how long a single document can be.
| Plan | Free | Student | Pro |
|---|---|---|---|
| Words per month | 150 | 30,000 | 100,000 |
| Price | $0 | $7.99 / month | $19.99 / month |
| AI Humanizer | Yes | Yes | Yes |
| Paraphraser | Yes | Yes | Yes |
| AI Detector | Yes | Yes | Yes |
| Citation Generator | Yes | Yes | Yes |
| Longer documents per request | — | Yes | Yes |
| Cancel anytime | — | Yes | Yes |
The words in the text you submit. Output words are never charged. A 1,200-word essay costs 1,200 words whether you humanize it, paraphrase it, check it for AI, or generate citations for it, because every tool shares the same monthly pool.
No. Free includes 150 words per month with no payment details. Paste as much as you like: the Humanizer and Paraphraser work on the first 500 words and show the first 150 of the result, and the rest unlocks the moment you upgrade. You only reach checkout when you choose Student or Pro.
Yes, from Settings → Manage billing, which opens the Stripe customer portal. Cancelling at the end of the current paid period keeps your words until then.
No. The pool resets at the start of each month — including on annual plans. Annual billing charges once a year; the Student and Pro word allowances still refresh monthly. Your reset date is shown in Settings once you are signed in.
Start on Free to see how the tools handle your writing. Student suits a few essays or articles a month; Pro is for daily use or long documents. You can move between plans whenever your needs change.
Prices are shown in your local currency where we offer one — pounds in the UK, euros in the eurozone, Canadian and Australian dollars, and adjusted local prices in several other countries. Checkout charges exactly the amount shown, so there is no conversion surprise on your statement. Everywhere else we bill in US dollars.
Something else? Read the help center or email hello@kinzoai.com.