DMOJ vs Questionmark
DMOJ
dmoj.ca
Questionmark
questionmark.comSide by side
| Figure | DMOJ | Questionmark |
|---|---|---|
| Price from | Free | — |
| Free plan | Yes | — |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | Yes |
| macOS | — | Yes |
| Linux | Yes | — |
| iOS | — | Yes |
| Android | — | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 2 | 2 |
| Spec score · Automated Grading Software | 8.2 (#11) | 8.3 (#10) |
| Self-hosting | The maker provides documentation for installing the DMOJ site and judge. | Questionmark sells an OnPremise deployment that runs on customer-authorized physical or virtual servers, with an approved supported installation required for vendor support. |
| Support | The site asks users with questions about hosting contests to contact a moderator. | Questionmark advertises 24/7 support and support through account-management and technical-support teams by email and telephone for proctoring services. |
Plans
In their own words
DMOJ
DMOJ is an open-source platform for programming contests and an archive of programming problems. Its archive includes tasks from past CCC, CCO, COCI, IOI and JOI competitions, among other sources, and it runs a monthly open programming competition. Public contests can be hosted at no cost. Contest formats include ICPC, IOI, AtCoder and ECOO, with system testing, hidden scoreboards and virtual participation. Judging supports interactive and signature-graded tasks, runtime data generators, custom output validators, per-language resource limits and scaling to hundreds of judging servers. Problem statements can include Markdown, LaTeX math and figures, syntax highlighting, PDF generation and built-in editorials. DMOJ integrates with Stanford MOSS for plagiarism checking and supports OAuth login, two-factor authentication and fine-grained staff permissions. Documentation is available for self-hosting the site and judge; the installation guide says the site is tested with MySQL and is unlikely to work with other databases. AI use is prohibited in rated contests, and judging resources cannot be used for AI training.
Questionmark
Questionmark has no write-up on Specifiction yet; its figures are above.