Noplag
8.3#1 in plagiarism checkersFrom $9.99 a monthFree planWebAPILinuxmacOS
VisitNoplag vs WINNOWR
What both publish
| Fact | Noplag | WINNOWR |
|---|---|---|
| Audience | The pricing page positions Pro for makers and small teams, Premium for agencies and publishers, and Enterprise for universities and regulated organizations. | Longsight presents Winnowr as academic-integrity software for institutions, with a focus on plagiarism detection and reviewable evidence. |
| Company history | Noplag says it launched in Kyiv in 2014, joined a New York EdTech accelerator in 2018 and raised $200,000 in seed funding. | Longsight says Sam Ottenhoff and Scott Siddall founded the company in 2004. |
| Integrations | The features page lists Canvas, Moodle, Blackboard, and Brightspace integrations via LTI 1.3. | The production-style runtime uses SQLite, Cloudflare Queues, and Cloudflare R2. |
| License | Noplag identifies its detection engine as open source under the Apache 2.0 license. | The repository is licensed under GNU AGPLv3. |
| Matching | The live product uses winnowing fingerprints and live-web matching to find verbatim and near-verbatim copying; MinHash LSH and vector reranking are listed as future releases. | It normalizes text, creates word-shingle fingerprints, searches an index for overlap, and fetches likely source pages for evidence. |
Noplag plans
- FreeFree
- Pro$9.99 a month
- Premium$19.99 a month
- EnterprisePriced on request
WINNOWR plans
No prices published.
Pick Noplag if…
Noplag may suit people checking documents for verbatim or near-verbatim overlap, including makers, small teams, agencies, publishers, and educational organizations. The listed plans range from a three-check monthly free tier to custom Enterprise arrangements.
Pick WINNOWR if…
WINNOWR suits institutions seeking academic-integrity software for plagiarism detection and reviewable evidence. Its self-hosted option and corpus-building workflow may fit institutions that want to run the system themselves.