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StrikePlagiarism
What StrikePlagiarism is
StrikePlagiarism is an academic-integrity system that checks text similarity, paraphrasing and AI-generated content. It searches open internet sources, university databases and publisher repositories. Its interactive report shows similarity coefficients, source breakdowns, paraphrasing detection, citation tracking and manipulation alerts. An integrated AI module gives fragment-level probability analysis; the functionality page states 98% or higher detection accuracy, fewer than 1% false positives and support for more than 100 languages. Translated-text search also covers more than 100 languages, while grammar checking supports over 30 languages with correction hints and categorized errors. Integrations include Moodle, Canvas, Blackboard, Brightspace, Schoology, OJS, Google Classroom and Microsoft Teams, plus API, LTI 1.3, LDAP and SSO options. Institutional installations can use a client database. Individual documents and reports are not stored, but individual accounts cannot check university databases or connect LMS and API integrations.
Who it suits
It suits schools, universities, publishers and other organisations checking originality, paraphrasing or AI-generated writing. Individual users can purchase tokens, while institutional accounts provide broader integrations and database access.
What it does well
- Similarity, paraphrasing and AI-content checks
- Searches internet, university and publisher sources
- Reports include citation and manipulation indicators
- Integrations with major learning platforms
- API and self-hosted deployment options
What to know first
- Paid service with no free plan
- Individual accounts cannot check university databases
- Individual accounts lack LMS and API connections
- Token plan checks 18,000 characters each
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Individual token | per token; 1 token checks 18,000 characters · Tokens valid for 6 months · additional options increase the price | $2.50, paid once |
| Corporate price per account | 0,8–2,5 USD/EUR per user/author; final price depends on account count, contract term, library access and requested services · Only active users uploading documents are counted | On request |
| Corporate price per page | 0,03–0.10 USD/EUR per page · Final price depends on page/character count, contract term and requested services | On request |
| Corporate price per document | 2–5 USD/EUR per document; final price depends on document size, contract term, library access and requested services · Additional services may affect price | On request |
As strikeplagiarism.com lists them, read 8 Oct 2026. The maker's own page has the final word.
Verdict
StrikePlagiarism combines similarity checking, AI analysis, translated matching and grammar tools. Institutional and individual accounts differ substantially in repository access and integrations, so the suitable setup depends on how documents are managed.
Facts from StrikePlagiarism's own pages
- AI detection
- The AI module is integrated into the Similarity Report and provides fragment-level probability analysis. · strikeplagiarism.com, 8 Oct 2026
- AI languages and accuracy
- The functionality page states 98%+ detection accuracy, less than 1% false positives and AI detection in 100+ languages. · strikeplagiarism.com, 8 Oct 2026
- Corporate trial
- A corporate trial account is available to universities, colleges, publishers, schools and other organizations by submitting a form; no trial duration is stated on that page. · strikeplagiarism.com, 8 Oct 2026
- Founded
- 2002 · strikeplagiarism.com, 23 Sept 2026
- Grammar checking
- The grammar module supports more than 30 languages and displays correction hints and categorized errors. · strikeplagiarism.com, 8 Oct 2026
- Headquarters
- Warsaw, Poland · strikeplagiarism.com, 23 Sept 2026
- Individual account limits
- An individual account cannot check university databases and cannot connect to LMS or API integrations. · strikeplagiarism.com, 8 Oct 2026
- Individual account privacy
- Individual-account documents and similarity reports are not stored in the database and are available only to their author. · strikeplagiarism.com, 8 Oct 2026
- Institutional data control
- The company offers an optional installation on a client’s own database for institutional data control and local repository storage. · strikeplagiarism.com, 8 Oct 2026
- Integrations
- Listed integrations include Moodle, Canvas, Blackboard, Brightspace, Schoology, OJS, Google Classroom and Microsoft Teams, with API, LTI 1.3, LDAP and SSO options. · strikeplagiarism.com, 8 Oct 2026
- Purpose
- StrikePlagiarism is an academic integrity system for detecting text similarity, paraphrasing and AI-generated content. · strikeplagiarism.com, 8 Oct 2026
- Security
- The company says client data is stored on secure EU-based servers with SSL encryption and access-controlled architecture, and that the system complies with ISO/IEC 27001:2022. · strikeplagiarism.com, 8 Oct 2026
- Similarity report
- The interactive report includes similarity coefficients, source breakdown, paraphrasing detection, citation tracking and manipulation alerts. · strikeplagiarism.com, 8 Oct 2026
- Similarity search
- The system searches open internet sources, university databases and publisher repositories. · strikeplagiarism.com, 8 Oct 2026
- Support
- The site states that institutional support is available in 15+ languages and offers 24/7 availability by email, phone and secure communication channels. · strikeplagiarism.com, 8 Oct 2026
- Translated similarity
- The translated-text search supports more than 100 languages and displays translated matches in the interactive report. · strikeplagiarism.com, 8 Oct 2026
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