DMOJ vs Wayground (formerly Quizizz)

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.

Wayground, formerly Quizizz, is an AI-supported platform for teaching, practice, and assessment. Teachers can create assessments and quizzes, lessons, passages, flashcards, and interactive videos with 18+ question types. Wayground AI can generate assessments from prompts, documents, webpage links, curricula, YouTube videos, and uploaded images. Teachers can host live sessions or assign work for students to complete asynchronously, with modes such as Paper Mode, Mastery Peak, and Test mode. Differentiation options include extra time, Read Aloud, reduced answer choices, and alternate assessment versions. Listed learning-management integrations include Google Classroom, Canvas, Schoology, Microsoft Teams, Blackboard, Moodle, Brightspace, and Toddle. Clever and ClassLink are listed for school and district rostering. Wayground supports browser access on Android, iOS/Mac, Windows, and Linux, with Student and Teacher apps on iOS and Android. The free Starter plan stores up to 20 resources and allows up to 100 participants per session; features may vary by region. Individual (Super) costs $18 a month billed annually, includes a 7-day trial, and allows up to 1,000 participants per session.