StrikePlagiarism
StrikePlagiarism is an academic integrity system for finding text similarity, paraphrasing, and AI-generated content.
What StrikePlagiarism is
StrikePlagiarism is an academic integrity system for finding text similarity, paraphrasing, and AI-generated content. It searches open internet sources, university databases, and publisher repositories, then presents an interactive report with similarity coefficients, source breakdowns, citation tracking, paraphrase detection, and manipulation alerts. Its integrated AI module gives fragment-level probability analysis; the listed functionality states detection accuracy above 98%, fewer than 1% false positives, and support for more than 100 languages. Translated-text matching covers more than 100 languages, while grammar checking supports over 30 languages. Integrations include Moodle, Canvas, Blackboard, Brightspace, Schoology, OJS, Google Classroom, and Microsoft Teams, with API, LTI 1.3, LDAP, and SSO options. Individual tokens cost $2.50, paid once and check 18,000 characters; no free plan is listed.
Good
- Searches internet, university, and publisher sources
- Integrated AI analysis covers 100+ languages
- Reports include citation and manipulation alerts
- Offers LMS, API, LTI, LDAP, and SSO integrations
- Optional client-database installation supports local storage
Watch out
- No free plan is listed
- Individual accounts cannot check university databases
- Individual accounts cannot connect LMS or API integrations
- Individual token costs $2.50, paid once
Who it suits
StrikePlagiarism suits schools, universities, publishers, and other organizations checking originality, paraphrasing, or AI-generated text. Individual users can use token checks but cannot access university databases or LMS/API integrations.
Verdict
StrikePlagiarism provides similarity, translated matching, grammar, and AI-content analysis with extensive institutional integrations. Individual and corporate options differ substantially, so account limits and pricing structure should guide the choice.
Plans and prices
From StrikePlagiarism's own pricing page, checked 8 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Individual token | $2.50, paid once | Tokens valid for 6 months · additional options increase the price · per token; 1 token checks 18,000 characters |
| Corporate price per account | Priced on request | Only active users uploading documents are counted · 0,8–2,5 USD/EUR per user/author; final price depends on account count, contract term, library access and requested services |
| Corporate price per document | Priced on request | Additional services may affect price · 2–5 USD/EUR per document; final price depends on document size, contract term, library access and requested services |
| Corporate price per page | Priced on request | Final price depends on page/character count, contract term and requested services · 0,03–0.10 USD/EUR per page |
The facts
Each one read from StrikePlagiarism's own pages, with the date it was checked.
What it does
- AI detection
- The AI module is integrated into the Similarity Report and provides fragment-level probability analysis.checked 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.checked 8 Oct 2026
- Grammar checking
- The grammar module supports more than 30 languages and displays correction hints and categorized errors.checked 8 Oct 2026
- Individual account limits
- An individual account cannot check university databases and cannot connect to LMS or API integrations.checked 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.checked 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.checked 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.checked 8 Oct 2026
- Purpose
- StrikePlagiarism is an academic integrity system for detecting text similarity, paraphrasing and AI-generated content.checked 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.checked 8 Oct 2026
- Similarity report
- The interactive report includes similarity coefficients, source breakdown, paraphrasing detection, citation tracking and manipulation alerts.checked 8 Oct 2026
- Similarity search
- The system searches open internet sources, university databases and publisher repositories.checked 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.checked 8 Oct 2026
- Translated similarity
- The translated-text search supports more than 100 languages and displays translated matches in the interactive report.checked 8 Oct 2026
Money
- 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.checked 8 Oct 2026
The company
- Founded
- 2002checked 23 Sep 2026
- Headquarters
- Warsaw, Polandchecked 23 Sep 2026
Alternatives to StrikePlagiarism
- 1
Noplag
Free planOpen sourceWebAPILinuxmacOS8.3From $9.99 a month - 2
Plagiarisma
Free planAndroidWebAPIExtension8.0From $99 a year - 3
Dolos
Free planOpen sourceWebAPILinuxmacOS7.7Free plan - 4
Originality.ai
Free planWebAPIExtension7.6From $12.95 a month - 5
Copyscape
Free planWebAPISelf-hosted7.5From $4.95 a month - 6
PlagAware
Free planWebAPI7.4Free plan