Topcoder is described as 'Provides members opportunities to demonstrate their expertise, improve their skills, and win cash, while helping real world organizations solve real world problems' and is an website in the development category. There are more than 25 alternatives to Topcoder, not only websites but also apps for a variety of platforms, including SaaS, Windows, Mac and Linux apps. The best Topcoder alternative is LeetCode, which is free. Other great sites and apps similar to Topcoder are HackerRank, Codewars, Edabit and AtCoder.
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.
A fun social platform for hackers to solve interesting puzzles, build quick hacks, code game bots and collaborate to solve real-world challenges.
When learning to code, most people get stuck on the "bridge" between memorizing syntax and understanding the logic that makes it all work. We believe the most effective way to learn a programming language is to break the process into three phases:
AtCoder.jp is a Japanese online competitive programming platform that hosts algorithmic programming contests, practice problems, and virtual contests for programmers of all levels.
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.
Codejudge Assessment Suite is the best-in-class developer evaluation platform powered with real-world tech assessments. Codejudge enables recruiters to create custom tests on a plethora of skills and tech roles.
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.
The online programming practice in java and python.
CodingBat is a free site of live coding problems to build coding skill in Java, and now in Python (example problem), created by Nick Parlante who is computer science lecturer at Stanford. The coding problems give immediate feed.
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.
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