Alternatives

Products that do what CodeArena does

Challenge friends to solve algorithmic problems in real time

1. 1
   CodeArena — Enter the Colosseum of Code▲7

   code and compete

   Jul 2026 · codearena2-zeta.vercel.app

2. 2
   CodeArena▲2

   Competitive coding platform with a built-in AI mentor.

   May 2026 · codearena.sbs

3. 3
   CodeBanana▲336

   Real-time coding collaboration, just like Google Docs

   Oct 2025

4. 4
   CodenQuest▲282

   Master coding through play, Everywhere!

   2024

5. 5
   Code Arena▲272

   Prompt once. Compare multiple AI-built apps for free.

   Feb 2026 · arena.ai

6. 6
   SolveFaction▲77

   Short mobile LeetCode-like challenges in game-like app

   2020

7. 7DC
   DesignArena – crowdsourced benchmark for AI-generated UI/UX▲89

   I’ve been using AI to generate some repetitive frontend (guilty), and while most outputs felt vibe-coded, some results were surprisingly good. So I cleaned it up and made a ranking game out of it with friends, and you can check it out here: https://www.designarena.ai/vote /vote: Your prompt will be answered by four random, anonymous models. You pick the one you prefer and crown the winner, tournament-style. /leaderboard: See the current winning models, as dictated by voter preferences. /play: Iterate quickly by seeing four models respond to the same input and…

   2025 · designarena.ai

8. 8
   CodeFights▲96

   Practice Programming

   2014

9. 9
   Coding Rooms▲134

   Real-time platform for teaching programming

   2020

10. 10
    Codédex v1.0▲272

    Start your coding adventure ⋆˙⟡

    2025

11. 11BA
    Byte Arena – Code Your Fighter Bot▲179

    2017 · doc.bytearena.com

12. 12
    Agent Arena▲357

    The first public arena for AI agents

    Jun 2026 · arena42.ai

13. 13
    Runtime▲303

    Sandboxed coding agents for everyone on your team

    May 2026 · runtm.com

14. 14
    BitFight▲2

    1v1 Coding Duels: Solve Faster, Win the Arena.

    Mar 2026 · bitfight.in

15. 15
    Codejudge▲298

    Automate tech hiring with simulated real world assessments

    2021

16. 16
    Codelita▲301

    Learn coding from scratch on your phone

    2023

17. 17
    Ona (formerly Gitpod)▲260

    Sandboxed parallel coding agent platform

    Sep 2025

18. 18
    CodeOrbital▲115

    Code, preview, share, and host with AI Power

    2025

19. 19
    Real Dev▲214

    Real-life coding skill challenge

    2019

20. 20
    Model Kombat by HackerRank▲129

    The AI Code Arena

    Sep 2025

21. 21
    CodeDuelz v2.0.1▲2

    From practice to performance.

    Apr 2026 · codeduelz.com

22. 22CA
    Coderoulette, a pair programming game for developers▲42

    Hello everyone, We just launched a side-project we have been building over the last couple of months -- Coderoulette is a pair programming game for developers, like a Chatroulette for hackers. We match developers in real time and give them coding challenges they have to solve doing pair programming using a collaborative IDE and video conference. You can check it out here: https://www.coderoulette.com/ We also published an article explaining how we built it. I'd love to hear your feedback.…

    2016

23. 23
    Battle of Coders▲3

    "Real-time platform for solo coding, duels & tournaments"

    May 2026 · neuroverse.fun

24. 24CA
    Codeium – a free, fast AI codegen extension▲86

    I'm Varun, CEO of Exafunction, and we just released Codeium to open up access of generative AI to all developers for free. In the spirit of Show HN, we created a playground version for anyone to try this tech in the browser (click Try in Browser)! We have built scalable, low-latency ML infra for many top AI companies in the past, and we are excited to leverage that tech into a product that we, as developers, would love. We hope that you do too, and we would appreciate any feedback that this community has for us!

    2022 · codeium.com

Ranked by how close each launch is in meaning, then by votes. Refine with a description →