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Tech riderRev. 22 Sept 2026

NextJudge

Ch 186.3of 30 Coding Challenge Platforms
  1. 1Runs onAPI, self-hosted, Web
  2. 2CostsNot stated by the maker
  3. 3Primary usecontests
  4. 4Languages supportedC++, C, Python, PyPy, Java, JavaScript, TypeScript, Go, Rust, Ruby, Lua, Kotlin, Haskell
  5. 5Custom challengesYes
4 lines stated Written from the maker's own pages: nextjudge.net
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The NextJudge homepage

Overview

NextJudge is ranked #18 of 30 in coding challenge platforms on Specifiction. It runs on API, Self-hosted, Web.

Compared on coding challenge platforms

Primary use
contestsnextjudge.net
Languages supported
C++, C, Python, PyPy, Java, JavaScript, TypeScript, Go, Rust, Ruby, Lua, Kotlin, Haskellnextjudge.net
Custom challenges
Yesnextjudge.net

Facts

Purpose
NextJudge is an open, self-hostable platform for hosting and participating in competitive programming contests.nextjudge.net · 4 Oct 2026
Code editor
Its code editor uses Monaco and provides syntax highlighting and multiple themes.nextjudge.net · 4 Oct 2026
Contest tools
The platform includes live leaderboards, contest Q&A, live submissions, real-time submission feedback and activity overviews.nextjudge.net · 4 Oct 2026
Language support
The maker’s homepage lists Python, JavaScript, C++, Go, Haskell, Kotlin, C#, Java, TypeScript, PHP, Swift, Rust, C, Lua and Ruby.nextjudge.net · 4 Oct 2026
Execution
Judge workers compile and run submitted code in nsjail sandboxes.docs.nextjudge.net · 4 Oct 2026
API and CLI
NextJudge provides a REST API and CLI for direct access and automation.docs.nextjudge.net · 4 Oct 2026
Authentication
The setup guide supports email and password registration or GitHub sign-in when OAuth is configured.docs.nextjudge.net · 4 Oct 2026
Data control
The maker says participant data, problems and submissions are stored in PostgreSQL on infrastructure the operator controls.docs.nextjudge.net · 4 Oct 2026
Security operations
The deployment guide recommends keeping judge workers network-separated from internal admin tools and rate-limiting authentication and password-reset routes at the proxy.docs.nextjudge.net · 4 Oct 2026
Requirements
A local deployment requires Docker and Docker Compose, at least 4 GB RAM (8 GB with web and judge together), and ports 5000, 5432, 5672 and 8080 free.docs.nextjudge.net · 4 Oct 2026
Operational tradeoff
Self-hosters are responsible for operating the database, message queue, judge images, backups, monitoring and network isolation.docs.nextjudge.net · 4 Oct 2026
Support
The homepage lists [email protected] as its contact address and invites users to join a waitlist for early access.nextjudge.net · 4 Oct 2026

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Where it ranks on Specifiction

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Sources