The Best 19 Kattis Alternatives

  • hackerrank.com

    A fun social platform for hackers to solve interesting puzzles, build quick hacks, code game bots and collaborate to solve real-world challenges.

    Free Web

  • Coderbyte

    Coderbyte is a place built for anyone to practice and perfect their programming skills. Challenges are added almost every day so you can work on applying your algorithmic thought process on any problem you want at anytime.

    Freemium Web

  • Project Euler

    Project Euler is a series of challenging mathematical/computer programming problems that will require more than just mathematical insights to solve.

    Free Web

  • Codility.com

    The programmer testing solution that matches your job descriptions and helps you hire great developers faster.

    Commercial Mac OS X Windows Android iPhone Web

  • CodeFights

    Duel with friends and foes in head-to-head programming battles!.

    Free Personal Web

  • Codewars

    Achieve code mastery through challenge. Improve your skills by training with others on real code challenges Kata In our dojo, kata are real code challenges...

    Free Self-Hosted

  • CheckIO

    CheckiO is expanding the world’s code literacy through gameplay. We always wanted to create the most entertaining game where gaming and coding experiences are interlaced, where there is no border between playing and learning new skills.

    Free Open Source Web Pycharm WebStorm

  • Topcoder

    Topcoder provides members opportunities to demonstrate their expertise, improve their skills, and win cash, while helping real world organizations solve real world problems.

    Free Web

  • Codeeval

    CodeEval is platform for hosting coding challenges which has over 20,000+ competitive developers.

    Free Web

  • Codela

    Screen technical skills automatically with online coding challenges. Save time, reduce recruitment costs and hire better developers.

    Commercial Web

  • Vim Adventures

    VIM Adventures is an online game based on VIM's keyboard shortcuts (commands, motions and operators). It's the "Zelda meets text editing" game.

    Commercial Web

  • Screeps

    Learn to code JavaScript by playing game. This game claims to be the world’s first MMO strategy sandbox game for programmers.

    Commercial

  • DevScreen

    DevScreen helps companies to test software developers on their ability to carry out tasks that they will be expected to do in the job. Easily build reusable tests that...

    Commercial Web

  • Interviewme.io

    InterviewMe is an automatic recruiting platform. It helps you to filter out inappropriate candidates, saving you money and time. We are an automatic recruiting...

    Freemium Web

  • Hackerearth

    a social and community platform for students and developers for solving programming puzzles, sharing notes and practicing concepts with the online editor, live...

    Free Web