Noplag vs Turnitin Originality
Noplag
noplag.comTurnitin Originality
turnitin.comSide by side
| Figure | Noplag | Turnitin Originality |
|---|---|---|
| Price from | $9.99/mo | — |
| Free plan | Yes | — |
| Free trial | Yes | — |
| Open source | Yes | — |
| Web | Yes | Yes |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | — |
| API | Yes | — |
| Self-hosted | Yes | — |
| Plans published | 4 | 1 |
| Spec score · AI Plagiarism Checkers | 9.2 (#3) | 6.6 (#24) |
| Audience | The pricing page positions Pro for makers and small teams, Premium for agencies and publishers, and Enterprise for universities and regulated organizations. | Turnitin Originality is presented as an institutional product for educators and administrators seeking academic integrity insights and data for policy decisions. |
| Founded | 2014 | 1998 |
| Integrations | The features page lists Canvas, Moodle, Blackboard, and Brightspace integrations via LTI 1.3. | Turnitin Originality and Originality Check can be accessed through Turnitin’s website or an integrated learning management system, and both license types support LTI 1.3 integrations. |
| Privacy | Noplag states that submitted documents are not used to train models or shared between accounts, and EU data residency is available. | Turnitin states that it acts as a data processor under EU and UK GDPR when providing services to customers or users. |
| Security | Noplag says it encrypts data in transit and at rest and does not yet hold formal attestations such as SOC 2. | Turnitin says it uses safeguards including firewalls and encryption and undergoes annual SOC 2 Type II audits by an independent auditor. |
| Support | Free includes community Discord support, Pro includes email support, and Premium includes priority support with a 12-hour response target. | Turnitin’s Help Center provides user guides, release notes, a searchable knowledge base, and access to its technical support team. |
Plans
In their own words
Noplag
Noplag is an open-source plagiarism checker with a hosted cloud service and an engine released under Apache 2.0. Its current matching uses winnowing fingerprints and live-web comparison to find verbatim and near-verbatim copying; it does not detect paraphrase. Sources include the open web, Common Crawl, Wikipedia, academic indexes, the Noplag Database and users’ own folders. Submit DOCX, PDF, TXT, ODT or RTF files, paste text or provide a URL. Reports link matches to their sources, display similarity scores and exact overlapping text, and can be exported as PDFs. Detection is calibrated at launch for English, Spanish, Portuguese, Polish and Ukrainian. AI-content detection is marked as coming soon and intended as a separate signal. The free plan allows three checks per month, up to 2,500 words per check, with community Discord support. Pro costs $9.99 a month and includes 50 monthly checks, up to 25,000 words per check, database and academic-index matching, REST API and webhooks, and email support. A 14-day trial is listed.
Turnitin Originality
Turnitin Originality has no write-up on Specifiction yet; its figures are above.