Simple plans that grow with you
One credit = one full check (similarity and AI content) of up to 20,000 words.
All prices in USD, excluding tax. Applicable VAT, GST or sales tax is added at checkout.
Free trial
Try one check free — no card needed.
- Files up to 5 MB
- 5 free checks (5 credits)
- Similarity % and AI-content % only
- Upgrade any time for the full report
Starter
For occasional checks of essays and articles.
US$1 per check · excl. tax
- 10 checks / month (10 credits)
- Files up to 120 MB
- Full report: highlighted passages and sources
- Watermarked PDF reports
- Web sources
Student
For students checking their own drafts.
US$0.88 per check · excl. tax
- 40 checks / month (40 credits)
- Files up to 250 MB
- Full highlighted reports
- Document comparison
- Report history
- Watermarked PDF reports
Researcher
For researchers, writers and editors.
US$0.83 per check · excl. tax
- 60 checks / month (60 credits)
- Files up to 500 MB
- Premium detection services (when set up)
- API access
- Priority processing
Need a licence for a university or institution?
Department, campus-wide and consortium licences with volume pricing, single sign-on, LMS integration, your choice of data region and invoicing. Contact us for more details and a tailored quote — we reply within one business day.
Pay as you go
Top up credits any time — they never expire while your account is open.
Free trial vs paid
| Free trial | Paid plans & credits | |
|---|---|---|
| Checks | 1 (1 credit) | By plan or credit pack |
| File size | Up to 3 MB | Up to 50 MB |
| Similarity % and AI-content % | ✓ | ✓ |
| Highlighted matching text | — | ✓ |
| Matched sources with links | — | ✓ |
| AI-content by passage | — | ✓ |
| Watermarked PDF report, comparisons, filters | — | ✓ |
All prices are in US dollars and exclude tax; VAT, GST or sales tax for your country is added at checkout. Have a promo code? Enter it at checkout. Discounts don't stack — you always get the best available price.