Alternatives to Codier for all platforms with any license

  • HackerRank

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

    Free Personal Web

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  • Project Euler

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

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  • CodeSignal

    CodeSignal is the leading provider of assessments for technical hires. As the creator of the Predictive Coding Score, a measure of a candidates coding skills, CodeSignal...

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  • Codewars

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  • 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...

    Free Open Source Web Pycharm WebStorm

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  • 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...

    Freemium Web

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  • Spoj

    Sphere Online Judge created for the coders' community to train, to learn and to make progress. With thousands of programming problems and an international group of...

    Free Web Self-Hosted

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  • Screeps

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

    Commercial $ $ $ Mac Windows Linux Web SteamOS

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  • Topcoder

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

    Free Web

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  • Codechef

    CodeChef was created by Directi as a way to continuously challenge and engage the developer community. Our goals are to provide a platform for practice, competition and...

    Free Web

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  • Codeeval

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

    Free Web

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  • Ruby Warrior

    This version of Ruby Warrior is a project by Bloc, a part-time online coding bootcamp for people who want to keep their current job, learn how to code, and become a...

    Free Personal Web

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