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Additional Information

Test 2010: S10-45 Viper

Software Profile | Testoverview | Summary| Screenshots | Business Promotion | Links

Software Profile

ID S10-45
Product Viper
Company „dynamic company based in Nottingham, England“

no further information

Web Site
Software Type Online
Costs free after registration
Test Date 2010-09-15


Ranking for all tests: 27
Ranking for tests 10-40: 25
Ranking for tests 31-40: 5
Usability: 12
Professionalism 22
Middle Ranking 18,2
Effectiveness (Grade): F
Overall Ranking: 20


Viper installs a 1.5 MB client on a PC system. The hissing red snake logo is not very pleasant to look at. The system cannot deal with umlauts and produces a complicated online report and an unintelligible printed one. Writing to the company at the address given when we called on the phone bounces, the address is strangely the same as for a paper mill / essay writing service. We checked the street address – it is the same for both companies – and the telephone numbers, that only differ in the last digit. Reading through the “Terms and condition” we find that by submitting a paper to Viper we give the company “All Answers Limited” the right to keep a copy of the paper and may use it for marketing purposes, either for Viper or for any “associated website”. This proves what many have often suspected: some supposedly plagiarism detection services are just harvesters for paper mills. Even if this were not the case – Viper has the distinction of being the worst system for detecting plagiarism, coming in last with just 24% of the effectiveness points on all test cases.

Company Statement


Screenshot 1: The Viper homepage

Screenshot 2: Comparison of Text in Viper

Screenshot 3: We faced a lot of problems using Viper.

Business Promotion

„Viper is the plagiarism checker of choice! It scans over 10 billion resources, has an easy-to-use interface and highlights areas of plagiarism – totally free!“


official website