Codewars is described as 'Achieve code mastery through challenge' and is a Code Learning service in the development category. There are more than 50 alternatives to Codewars, not only websites but also apps for a variety of platforms, including Windows, SaaS, Mac and iPhone apps. The best Codewars alternative is Codecademy, which is free. Other great sites and apps similar to Codewars are exercism, LeetCode, HackerRank and Code.org.
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.
United States
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 users Spoj is one of the best programmers' communities and online judges in the world.
HackerEarth is the most comprehensive developer assessment software that helps companies to accurately measure the skills of developers during the recruiting process.
United States
Leetcode Wizard is an invisible desktop application powered by AI, instantly providing answers to all Leetcode problems for effortless coding interviews, like having ChatGPT in your ear.
CodeChef is a not-for-profit educational initiative by Directi, an Indian software company. It is a global programming community that fosters learning and friendly competition, built on top of the world’s largest competitive programming platform.
India
Learn to code JavaScript by playing game. This game claims to be the world’s first MMO strategy sandbox game for programmers.
Russia
AtCoder.jp is a Japanese online competitive programming platform that hosts algorithmic programming contests, practice problems, and virtual contests for programmers of all levels.
Japan
A Website and Newsletter that helps software engineers level up their skills through a series of coding challenges that are:
AceCoder is an invisible desktop app that instantly delivers solutions to any coding interview question.
United Kingdom
DevSkiller is a developer screening and online interview platform powered by RealLifeTesting™ methodology. The tool allows you to find developers with the right skill set, shortening your Time-to-Hire by 60%.
Poland
EU
United States
This resource is created to provide short programming problems for all who wants learn programming and improve their programming skills, but who could not easily find enough tasks for practice.
