Codeforces is described as 'Website that hosts competitive programming contests' and is an app in the development category. There are more than 10 alternatives to Codeforces for Web-based, Self-Hosted, Mac and Windows. The best Codeforces alternative is HackerRank. It's not free, so if you're looking for a free alternative, you could try HackerRank or LeetCode. Other great apps like Codeforces are AceCoder, octree.io, Coderbyte and Spoj.
A fun social platform for hackers to solve interesting puzzles, build quick hacks, code game bots and collaborate to solve real-world challenges.
HackerRank is the most popular Web-based alternative to Codeforces.
HackerRank is the most popular free alternative to Codeforces.
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.
AceCoder is an invisible desktop app that instantly delivers solutions to any coding interview question.
AceCoder is the most popular Windows & Mac alternative to Codeforces.
octree.io is a platform where you can practice Leetcode-style problems in a room with other people. It serves as a supplement to Leetcode as you can invite your friends to practice problems together. It features a Game Room, Trivia Room and a Lobby which is a Slack-like chat...
octree.io is the most popular Open Source alternative to Codeforces.
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.
Coderbyte is the most popular commercial alternative to Codeforces.
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.
Topcoder provides members opportunities to demonstrate their expertise, improve their skills, and win cash, while helping real world organizations solve real world problems.
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.
HackerEarth is the most comprehensive developer assessment software that helps companies to accurately measure the skills of developers during the recruiting process.
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 Codeforces.
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