CLUSTER CONTESTS-CODING-COMPETITIVE · 14 ENTRIES · EARLIEST ENTRY 2026-09-04
Competitive coding contest platforms
This cluster consists of web platforms for hosting competitive programming contests, quizzes, and live coding challenges, with features like leaderboards, real-time rankings, and participant/organizer portals. The dated history is too thin to read a shape from—only two dated entries exist before the index start, so the cluster predates the index or its members are undated. On traction, algoarena leads with 1 star, while robinsundman and NexusCode have 0 stars.
Entry timeline
ENTRY TIMELINE
Each bar is the month a member carries, which is a creation date where the source published one and a crawl date otherwise. Nothing in the index was found before 11 August 2026, and coverage broadened sharply on 14–15 August, so a bar from then on reports how much we found that month, not how much was built; an earlier bar reports how far back a member's own source dated it — not how long we have been watching.
Members by activity
Activity signals, not revenue.
Build origin · 2 ai-built · 2 hand-coded · 10 unlabelled
Operator · 6 hobby · 2 indie · 1 open source · 5 unlabelled
Two labels per entry, never collapsed into one: how it was built, and who stands behind it. Counted over the 14 listed below. Unlabelled means nothing has decided yet — not that the answer is small.
- 01cwc_262★26 days—Web platform that hosts a coding tournament for an event with real-time scores and interactive game elements.
- 02quiz-website1★17 days—Web app for hosting live multiplayer quizzes where players join via code and answers are scored with speed bonuses.
- 03algoarena1★18 dayslivehand-codedhobbyWeb platform for competitive coding contests and quizzes with live timed events, leaderboards, and certificates.
- 04client-chaos-oss1★25 days—hobbyLive event platform for running timed client-chaos challenges where participants adapt to changing requests and admins broadcast, score, and export results.
- 05ccpcoj-community-fork0★10 days—hand-codedopen sourceOpen-source web platform for running programming contests with live scoreboards, ranking rules, and balloon management.
- 06codepulse0★5 dayslivehobbyWeb dashboard that combines competitive programming performance from multiple judges into leaderboards, contest reminders, and a community for interview experiences.
- 07robinsundman0★24 dayslivehobbyWeb platform for hosting live quiz events where players join via code and see leaderboards in real time.
- 08pollpools0★2 moliveindieMulti-tenant platform for creating prediction contests and community leaderboards without real money.
- 09NexusCode0★1 moliveWeb platform for competitive programming contests with separate portals for participants and organisers to manage events and submissions.
- 10Vibe-Coding-Website1★1 yrabandonedliveai-builthobbyEvent website for a frontend coding competition that showcases the contest and provides information to participants.
- 11Bolt-ai-dsa-leaderboard1★1 yrabandoned—ai-builthobbyA smart leaderboard and DSA contest analyzer that simulates real-time ranking for coding contests.
- 12CoreDump - Track & Compete in Coding Time0★unknownliveWeb app that tracks developers' coding time and streaks, enabling global competition on leaderboards.
- 13TNW Test | MVP von tut nicht weh0★unknownliveindieWeb app offering short skill-based mini-games with a leaderboard, testing an early daily-challenge platform concept.
- 14Nexus Code - Competitive Coding & Contest Platform0★unknownliveA platform for hosting competitive coding contests with an interactive IDE and live leaderboard.
Ranked by traction, highest first, and paged 20 at a time — this is a window on the cluster, never the whole of it. Ties are broken by a stable id so a product cannot appear on two pages or fall between them. Browse every cluster.