WINNOWR
APIyesOSS—FREE—DOCS4/5
WI6.7#17 of 28
outWeb—Windows—MacoutLinux—Android—iOS
Ranked in Plagiarism Detection Software ·No free plan on record
About
WINNOWR is ranked #17 of 28 in plagiarism detection software on Inferse. It runs on API, Linux, Self-hosted, Web.
Compared on plagiarism detection software
- Free plan
- Yesgithub.com
- API access
- Yesgithub.com
Facts
- Purpose
- WINNOWR is a CPU-first engine for detecting web-source matches in student writing and other long-form text.github.com · 4 Oct 2026
- Reports
- Reports include index overlap, candidate source URLs, and highlighted suspicious spans.github.com · 4 Oct 2026
- Matching
- The system uses deterministic text normalization and compact word-shingle fingerprints to find candidate source documents.github.com · 4 Oct 2026
- Corpus options
- Users can build an index from their own JSONL.zst corpus; the repository also describes FineWeb-Edu and Wikipedia workflows.github.com · 4 Oct 2026
- Submission methods
- The HTTP API accepts text or file submissions and provides submission, report, purge, and health endpoints.github.com · 4 Oct 2026
- Architecture
- The documented runtime uses SQLite, Cloudflare Queues, Cloudflare R2, and a local sharded index on disk.github.com · 4 Oct 2026
- Deployment
- The repository provides build and deployment instructions for running the API and worker, including on plain Linux machines.github.com · 4 Oct 2026
- License
- The repository is licensed under GNU AGPLv3, whose network-use provision requires modified deployed versions to make those modifications available under the same license.github.com · 4 Oct 2026
- Maturity
- Longsight describes Winnowr as an academic-integrity project still in development; the repository says it is usable but actively evolving.longsight.com · 4 Oct 2026
- Audience
- Longsight presents Winnowr as academic-integrity software for institutions, with a focus on plagiarism detection and reviewable evidence.longsight.com · 4 Oct 2026
- Hosting and support
- Longsight says it can host and support its products, and that products with a self-hosted option include a path for institutions to run them.longsight.com · 4 Oct 2026
- Company history
- Longsight says Sam Ottenhoff and Scott Siddall founded the company in 2004.longsight.com · 4 Oct 2026
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Where it ranks on Inferse
Sources
- github.com/LongsightGroup/winnowr· checked 4 Oct 2026
- longsight.com/solutions/· checked 4 Oct 2026
- longsight.com/about/· checked 4 Oct 2026