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CLUSTER COMPETITIVE-ELO-CODING · 5 ENTRIES · EARLIEST ENTRY 2026-08-14

Real-time coding duel platforms

These products are real-time competitive coding platforms that match programmers against each other on the same algorithm problem, using Elo/ELO ratings and leaderboards, with variants adding Codeforces integration, custom lobbies, tournaments, and AI-generated questions. The dated entry history is too thin to read a shape from: only one dated month exists before the index start, so the cluster predates the index or its members are undated. Among traction leaders, bridgebench leads with 119 stars, while ninjathons and CompileX have 0 stars.

Entry timeline

ENTRY TIMELINE

AUG 2026: 2SEP 2026: 2OCT 2026: 1
AUG 2026OCT 2026

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 · 5 unlabelled

Operator · 3 hobby · 2 unlabelled

Two labels per entry, never collapsed into one: how it was built, and who stands behind it. Counted over the 5 listed below. Unlabelled means nothing has decided yet — not that the answer is small.

  1. 01ninjathons0★18 days—hobbyCompetitive coding platform where users practice coding, compete in live 1v1 and territory matches, and take part in challenges.
  2. 02CompileX0★9 days—hobbyReal-time competitive coding platform where developers face off in matches with ELO rankings, tournaments, and AI-generated questions.
  3. 03CP-Arena0★1 mo—Competitive programming platform with Elo-based 1v1 matches, Codeforces integration, and custom lobbies.
  4. 04AlgoBattle0★2 molivehobbyReal-time competitive coding platform that pairs programmers to solve the same algorithm problem and ranks on an ELO leaderboard.
  5. 05CodeSync0★1 mo—Social coding platform that syncs LeetCode progress, enables private team challenges and leaderboards, and verifies solutions with AI.

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.