DOMjudge vs TAO

DOMjudge is a free system that automatically evaluates programming contest submissions and provides web interfaces for teams, juries, and the public. It is designed mainly for contests such as ICPC, where teams work on site against a fixed problem set and time frame. Judging can run across multiple judge hosts, and the system is designed to scale. Administrator tools support rejudging, clarifications, and detailed submission and judging information. A modular structure allows languages or compilers to be added, while a JSON REST API implements the ICPC Contest API with extensions, except for the optional team-members endpoint. DOMjudge imports Kattis Problem Tool packages, and Polygon2DOMjudge converts Codeforces Polygon exports. You can download and run it yourself; official Docker images are available for the domserver and judgehost. The listed latest stable release is version 9.0.1, dated 11 June 2026.

TAO is an online platform for creating, delivering and managing digital assessments. Authors can build tests manually, convert existing exam files, use AI-assisted drafting or import QTI packages. Question formats include Choice, Extended Text, File Upload, Hotspot and Text Entry. Scoring supports automatic and manual methods, partial credit, weighted responses and cut scores, with branching logic also available. Results can be reviewed through session and test-taker reports, custom reports, CSV results, Data Explorer and TAO Insights. TAO supports QTI 2.2 and QTI 3.0, and promotes interoperability through QTI and LTI. Delivery options include online, LMS via LTI, test centers, local proctoring, and cloud-hosted or self-hosted configurations. TAO Cloud offers shared or private hosting using providers including AWS, Google Cloud and Linode. Starter is free for one author and 50 learner attempts monthly; Community Edition is a free, self-hosted open-source option. Paid plans include TAO Author at $149 a month and TAO Ignite at $990 a month; custom plans are also listed.