NextJudge
NextJudge: A capable contest platform for teams that need control over deployment and participant data. Ranked #26 of 30 in Coding Challenge Platforms by our editors (6.6/10); pricing: Open source; best for self-hosted contest platforms.
At a glance
- Editor score6.6 / 10
- PricingOpen source
- Best forSelf-hosted contest platforms
- Paid fromFree
- Primary useContests
- Facts checked22 Sep 2026
Where it wins
- Sandboxed judging with nsjail and broad language support
- Timed contests include teams, clarifications, standings, and leaderboards
- REST API, CLI, problem import, and administrator authoring tools
Where it doesn't
- Requires organizations to deploy and manage their own infrastructure
- Access is currently presented through a waitlist
- Does not include published solution explanations
Our verdict on NextJudge
NextJudge is an open-source competitive programming platform for organizations that want to deploy programming contests on their own infrastructure. Its primary use is contests, with support for private classrooms, clubs, hiring events, and internal competitions. Participants can practice from a searchable, sortable problem catalog, edit code in a browser-based Monaco editor, submit solutions, and receive judging feedback. Administrators can create or bulk-import problems, configure contests, and manage participants. The platform supports C++, C, Python, PyPy, Java, JavaScript, TypeScript, Go, Rust, Ruby, Lua, Kotlin, and Haskell, along with custom challenges.
Its strongest fit is an organization that needs control over participant data, problems, execution environments, and deployment. Contest features cover registration, team participation, clarifications, standings, real-time leaderboards, and submission feedback, while sandboxed compilation and judging through nsjail provide a defined execution boundary. The REST API and command-line interface also support automation around problem management and contest operations. These capabilities make NextJudge more suitable for recurring private contests than for a lightweight, hosted practice tool.
The trade-off is operational ownership. Because NextJudge is self-hosted, the deploying organization is responsible for its own infrastructure and the surrounding administration. The official site currently invites users to join a waitlist, and the product is positioned around contest mechanics rather than published solution explanations. Choose NextJudge if self-hosting, customization, and contest administration are central requirements. Teams seeking a ready-to-access service or explanation-rich learning experience should consider an alternative focused on those needs.
Your product? Our editors can test NextJudge in depth and publish a review, labelled as paid · from $149/mo →
NextJudge pricing
NextJudge fact sheet
| Free plan | Not verified |
|---|---|
| Paid from | Free |
| Primary use | Contests |
| Languages supported | C++, C, Python, PyPy, Java, JavaScript, TypeScript, Go, Rust, Ruby, Lua, Kotlin, Haskell |
| Problem library size | Not verified |
| Solution explanations | Not verified |
| Custom challenges | Yes |
| Company assessments | Not verified |
| Deployment | Self-hosted |
| Platforms | Web |
| Support | Email, Docs |
| Built for | Small business, Mid-market, Enterprise (editorial estimate) |
| Pricing | Open source |
| Website | nextjudge.net |
| Facts checked | 22 Sep 2026 |
Alternatives to NextJudge
- LeetCodeA broad coding practice platform with judging, contests, study plans, and interview tools.9.4
- ExercismA free exercise platform combining broad language coverage, automation, and human feedback.9.2
- CodewarsA free, language-rich kata platform for structured practice and community learning.9.0
See all NextJudge alternatives →
Used NextJudge? Be the first to review it
The editor score above is our own research. What this page doesn't have yet is a reader's view — what you used NextJudge for, what worked and what didn't. No stars are seeded and no review is paid for; an editor reads every one before it appears.
Write a reviewTwo minutes · verified accounts only · read by an editor before it appears
Featured on iTechGuides
NextJudge is listed in our Coding Challenge Platforms directory. Add the badge to your site — it links back to this page.
<a href="https://www.itechguides.com/products/nextjudge/"><img src="https://www.itechguides.com/best/badge/nextjudge.svg" alt="Featured on iTechGuides" width="230" height="46"></a>
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
Last updated · How we research and update