Achieve code mastery through challenge.
- - Codewars is the most popular Web-based alternative to Spoj.
- - Codewars is the most popular free alternative to Spoj.
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.
Project Euler is a series of challenging mathematical/computer programming problems that will require more than just mathematical insights to solve. Although mathematics will help you arrive at elegant and efficient methods, the use of a computer and programming skills will be...
CodinGame is a challenge-based training platform for programmers where you can play with the hottest programming topics.
Develop your coding skills and practice them by competing with hundreds of players worldwide. Code your own bots in your preferred language and join the various competitions that we offer. Learn, win prizes, but most importantly, have fun coding!
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 Spoj.
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 Spoj.
- - DMOJ is the most popular Open Source alternative to Spoj.
The Ultimate Profile For Coders - Measure your skills and knowledge, compare them to market and find a personalized way to grow.
- - CodersRank is the most popular SaaS alternative to Spoj.
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.