DMOJ vs Möbius Assessment

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.

Möbius Assessment provides online homework and assessment capabilities for mathematics and STEM courses. Its math engine supports complex STEM learning and math autograding, while the platform offers 15 question types, from multiple choice to open-ended responses. Assessments can use algorithmically generated and randomized questions for homework, placement, proctored, or adaptive tests. With Show your work, instructors can award partial credit when a final answer is wrong. Educators can configure more than 50 assignment properties, including scheduling, feedback, access conditions, and security. Assignments can guide students through different learning paths, reinforce content, or revisit earlier objectives; students receive immediate feedback and instructors get engagement and understanding data. Möbius integrates with Canvas, Moodle, Blackboard, and Brightspace, including single sign-on and grade syncing. It is certified for LTI 1.3 Core and supports LTI Advantage Deep Linking. DigitalEd describes the environment as mobile-ready and lists Android, iOS, Linux, macOS, web, and Windows. Pricing is available by request. DigitalEd says versions older than 12 months are unsupported.