Dolos vs PlagiarismSearch
Dolos
dolos.ugent.be
PlagiarismSearch
plagiarismsearch.comSide by side
| Figure | Dolos | PlagiarismSearch |
|---|---|---|
| Price from | Free | $27.95/mo |
| Free plan | Yes | — |
| Free trial | — | Yes |
| Open source | Yes | — |
| Web | Yes | Yes |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | — |
| API | Yes | Yes |
| Self-hosted | Yes | — |
| Plans published | 2 | 7 |
| Spec score · Plagiarism Checkers | 9.0 (#5) | 7.9 (#12) |
| Audience | Dolos focuses on teachers checking programming tests and exams, as well as exercises where collaboration is allowed within small groups. | The maker presents the service for students, educators, writers, bloggers, universities, and organizations. |
| Integrations | Dolos provides a JSON API for automated integration with exercise platforms such as Dodona. | The maker lists a Moodle plugin, Google Docs add-on, customizable API, and Viber and Telegram bots. |
| Privacy | Team Dodona says it never shares submitted files or analysis reports and never uses them for commercial purposes; users can delete their data, and older data is periodically deleted. | The maker says uploaded documents are not stored, while reports may remain in an account and can be permanently deleted by the user. |
| Reports | Reports include similarity, total overlap, and the longest matching fragment for file pairs. | Reports highlight matching and similar passages, link them to detected sources, and provide a similarity report. |
| Support | General questions and support are handled through GitHub discussions, while bugs and feature requests use GitHub issues. | The maker lists live chat and email support and says its support team is available 24/7 on its Why Us page. |
Plans
PlagiarismSearch
- Light (Basic Package)$9.95, paid once
- Standard (Basic Package)$17.95, paid once
- Light (Monthly Package)$27.95 a month
- Light (3 Months Package)$34.95, paid once
- Premium (Basic Package)$41.95, paid once
- Standard (Monthly Package)$41.95 a month
- Premium (Monthly Package)$65.95 a month
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.
PlagiarismSearch
PlagiarismSearch checks submitted writing against selected web, archived, publication, academic, and enabled organizational sources. Its reports identify matching or similar passages, link those passages to detected sources, and provide a similarity report. An AI writing feature gives probability indicators for the full text and individual passages, highlighting passages for review. The service also lists paper analysis, readability, and spelling and grammar tools. Users can check up to 150 words for free, while registered users can check up to 300 words daily at no charge. The maker says its academic database contains over 500 million indexed texts. Integrations include a Moodle plugin, Google Docs add-on, customizable API, and Viber and Telegram bots. The maker presents it for students, educators, writers, bloggers, universities, and organizations. Paid options include a Light one-time package at $9.95, paid once and monthly packages from $27.95 a month. The maker says uploaded documents are not stored, though reports may remain in an account until deleted by the user.