Geektastic Alternatives

Achieve code mastery through challenge.

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

LeetCode is a platform for learning and improving coding skills with the goal of being fully prepared for programming interviews. Choose problems to solve from categories such as System Design, Algorithms and Database, join code contests and engage in mock interviews.

Screeps is a massive multiplayer online real-time strategy game. Each player can create his or her own colony in a single persistent world shared by all the players. Such a colony can mine resources, build units, conquer territory.

Online game for Python and JavaScript coders to improve skills.

CodinGame is a challenge-based training platform for programmers where you can play with the hottest programming topics.

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.

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 provides HR teams with Certified Assessments, Custom Tests, and Live Interviews.

Codility is an evidence-based platform helps hiring teams predict the real-life skills of their candidates, remotely and at scale. This brings faster hiring, time savings, and gives engineers more time to solve problems that matter.

CodersRank is a multi-award-winner startup (regional Get In The Ring competition & Central European Startup Award etc).