Free for schools
Pricing
A teacher with a school email checks 1,000 papers a month free. Everyone else starts with 2,000 words a day free. Every plan runs the same detector.
- Start here
Free
$0no card
Try it on a few papers you already know the answer to.
Check a paper free- 2,000 words a day
- Passages marked sentence by sentence
- All three settings
- Web app only
Pro
$20per month
For one person without a school email who checks papers most days.
Billing isn't connected yet, so this plan can't be bought. Use the Free plan until it opens.
- 300,000 words a month
- Up to 25,000 words in one check
- Passages marked sentence by sentence
- All three settings
- Web app, API and MCP server
Max
$65per month
For a tutoring service or a writing center that checks in volume.
Billing isn't connected yet, so this plan can't be bought. Use the Free plan until it opens.
- 1,500,000 words a month
- Up to 50,000 words in one check
- Passages marked sentence by sentence
- All three settings
- Web app, API and MCP server
Education
$0with a verified school email
For teachers and staff at a school or university. You verify the address once, at sign-up.
Get the school plan- 1,000 papers a month
- Up to 25,000 words a paper
- Passages marked sentence by sentence
- All three settings
- Web app, API and MCP server
Same detector on every plan, free or paid. We tested it against a commercial detector on the same 960 documents. See the comparison
Districts and universities
For a district or university that needs more than each teacher’s free plan, or wants one contract in place of many sign-ups.
- Larger allowance
- Larger checks
- API and MCP server
- Same detector
API use beyond a plan’s allowance, once billing is connected: $0.05 per 100 words
Compare plans
| What you get | Free | Pro | Max | Education |
|---|---|---|---|---|
| The check | ||||
| AI writing check | ||||
| Passages marked sentence by sentence | ||||
| Three settings | ||||
| Not scored under 50 words | ||||
| How much | ||||
| Allowance | 2,000 words a day | 300,000 words a month | 1,500,000 words a month | 1,000 papers a month |
| Largest single check | 2,000 words a day | 25,000 words | 50,000 words | 25,000 words |
| Unused allowance carries over | No | No | No | No |
| Where you use it | ||||
| Web app | ||||
| API | No | |||
| MCP server | No | |||
| On every result | ||||
| Detector run named | ||||
Pricing questions
Yes, with a verified school email: 1,000 papers a month. Without one, the Free plan gives you 2,000 words a day.
One check of up to 25,000 words counts as one paper. A longer paper is refused with a message naming the limit. It is never cut short.
Addresses ending in .edu, in .edu, .ac or .sch followed by a country code, or in a k12 state domain in the United States. You verify the address when you sign up.
2,000 words a day. A 1,000-word essay uses half of the day’s allowance. The dashboard counts down in the same unit.
No. Every plan runs the same detector, and every result names the detector run that produced it.
No. The Free plan resets each day and the school plan resets each month.
Our detector does not score text under 50 words, and readings under 150 words are weak. It tells you that instead of guessing.
Human scores the text in memory and does not save it. Neither this site nor our detector keeps a copy of the papers you check.
Not yet. Billing is not connected, so nothing is charged. Use the Free plan until the paid plans open.
It is not metered yet. No word count is kept against an API key; a key is held only to a ceiling on requests and words an hour. The rate above is what API use will cost once billing is connected.
Start with one paper.
No card. A verified school email gives you 1,000 papers a month free.