Simple, pay-as-you go pricing.

No complicated subscriptions or monthly payments. Just buy the credits you need, when you need them.

I want to scan words.

Credit(s) Price
1 credit £3.00 Buy Credit
1 credit A$5.50 Buy Credit
1 credit $4.00 Buy Credit
1 credit €3.50 Buy Credit
1 credit C$5.00 Buy Credit
3 credits A$13.50 Buy Credit
3 credits €8.50 Buy Credit
3 credits C$13.00 Buy Credit
3 credits $10.00 Buy Credit
3 credits £7.50 Buy Credit
5 credits £11.00 Buy Credit
5 credits €12.50 Buy Credit
5 credits C$19.00 Buy Credit
5 credits A$20.00 Buy Credit
5 credits $14.50 Buy Credit
10 credits €22.50 Buy Credit
10 credits C$34.00 Buy Credit
10 credits A$36.00 Buy Credit
10 credits $26.50 Buy Credit
10 credits £20.00 Buy Credit
20 credits £30.00 Buy Credit
20 credits C$51.00 Buy Credit
20 credits €34.00 Buy Credit
20 credits $39.50 Buy Credit
20 credits A$55.00 Buy Credit
50 credits A$90.50 Buy Credit
50 credits $66.00 Buy Credit
50 credits €56.50 Buy Credit
50 credits C$85.00 Buy Credit
50 credits £50.00 Buy Credit
Over 50 credits Contact us

Viper is an ideal scanner for any institution looking for a cost-effective, simple plagiarism checking solution. We can work closely with institutions to tailor bundles to your needs and provide bespoke features.

If you’re interested in a larger purchase for your institution, please fill out the below form with some information about your requirements and we’ll get back to you with a quote.


Viper is perfect for businesses, websites, and bloggers looking for a fast and powerful plagiarism scanner. From business reports to web copy to articles, Viper can check your text for matching content and help you resolve duplicate content issues before publishing.

If you’re interested in a larger purchase for your business, please provide some basic details about your requirements in the below form and we’ll get back to you with a quote.


Frequently asked questions

What does a credit cover?

One credit covers a single document of up to approximately 5,000 words (30,000 characters). Documents larger than this will require multiple credits – e.g. a single document of up to 15,000 words would require 3 credits; two documents up to 5,000 words each would require 2 credits.

What if I've submitted my paper to a plagiarism scanner (i.e. Turnitin) already?

Viper does not connect with other plagiarism scanners or Turnitin's database, meaning your work won't be matched against any previous scans you might have made. Your scanned work is also never submitted to other databases, so your results are entirely private to you.

Can I get a refund?

Of course! We're happy to refund you for unused credits if you decide you don't want to use them. Just contact our support team to request a refund.

I'm an educational provider/enterprise user. Can I get any discounts or buy larger bundles?

We can offer custom bundles of credits for business users or educational institutions such as universities, colleges and schools. We'll work with you to create a package that suits your needs. To discuss your needs further and enquire about a bundle, please fill out the relevant enquiry form above.

Get more information in our billing support section