Dolos vs WINNOWR
Dolos
dolos.ugent.beWINNOWR
github.comSide by side
| Figure | Dolos | WINNOWR |
|---|---|---|
| Price from | Free | — |
| Free plan | Yes | — |
| Free trial | — | — |
| Open source | Yes | — |
| Web | Yes | Yes |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 2 | 0 |
| Spec score · Plagiarism Detection Software | 9.0 (#5) | 6.7 (#27) |
| Audience | Dolos focuses on teachers checking programming tests and exams, as well as exercises where collaboration is allowed within small groups. | Longsight presents Winnowr as academic-integrity software for institutions, with a focus on plagiarism detection and reviewable evidence. |
| Integrations | Dolos provides a JSON API for automated integration with exercise platforms such as Dodona. | The production-style runtime uses SQLite, Cloudflare Queues, and Cloudflare R2. |
| Purpose | Dolos detects plagiarism by finding similarities between source code submissions. | WINNOWR is a CPU-first web-source detection engine for student writing and other long-form text. |
| Reports | Reports include similarity, total overlap, and the longest matching fragment for file pairs. | Reports include index overlap, source URLs, and highlighted suspicious spans. |
| Self-hosting | The open-source web application can be hosted by users on their own infrastructure. | The project describes itself as understandable and self-hostable, with an on-disk index and local runtime configuration. |
Plans
In their own words
Dolos
Dolos is a free, open-source tool for finding similarities between source-code submissions, particularly for teachers reviewing tests, exams, and exercises where collaboration may be allowed in small groups. Its analysis process tokenizes files, fingerprints token sequences, indexes matches, and produces reports. For each file pair, reports include similarity, total overlap, and the longest matching fragment. Dolos uses Tree-sitter parsers and supports languages including Bash, C, C++, C#, Elm, JavaScript, Java, PHP, Python, and TypeScript. The web app accepts ZIP files and detects languages from file extensions; in mixed-language archives, it analyzes only the dominant language unless a language is selected. Its public API accepts ZIP submissions up to 10 MB, with the CLI or library recommended for larger submissions. Analyses can also run locally, with results displayed in a browser, or on a self-hosted server. The free web app is hosted on Ghent University servers in Belgium. Dolos provides a JSON API for integrations such as Dodona and lists CSV as a report export format.