Achieve code mastery through challenge.
- - Codewars is the most popular Web-based alternative to Topcoder.
- - Codewars is the most popular free alternative to Topcoder.
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.
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:
- - Edabit is the most popular commercial alternative to Topcoder.
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.
Practice problem solving and compete against others on the DMOJ, a modern contest platform and archive of programming problems.
- - DMOJ is the most popular Self-Hosted alternative to Topcoder.
- - DMOJ is the most popular Open Source alternative to Topcoder.
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.
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.
At Programmr you can code, compile & run your programs directly in the browser. Supported platforms include C++, Java, PHP, C#, Flex, J2EE, Objective-C and many others. Programr is the fastest way to become a programming guru!
At Geektastic we help our client's thoroughly evaluate their future talent using our unique peer reviewed code challenge platform. We believe a candidate is worth more than a score and the only way to thoroughly understand how suitable they are to work in your team is to...
- - Geektastic is the most popular Windows & iPhone alternative to Topcoder.