LeetCode is described as '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' and is a Code Learning service in the development category. There are more than 50 alternatives to LeetCode, not only websites but also apps for a variety of platforms, including Windows, Mac, Android and SaaS apps. The best LeetCode alternative is exercism, which is both free and Open Source. Other great sites and apps similar to LeetCode are Codecademy, HackerRank, Project Euler and Codewars.
Download and solve practice problems in over 30 different languages. For code newbies and experienced programmers.
Almost everyone thinks exercism is a great LeetCode alternative.
exercism is the most popular Web-based alternative to LeetCode.
exercism is the most popular Open Source & free alternative to LeetCode.
Explore free interactive coding courses in web development, data science, and various languages. Codecademy offers a fun, collaborative learning environment with community support, personalized paths, skill assessments, and more, covering both foundational and advanced concepts.
Codecademy is the most popular Android & iPhone alternative to LeetCode.
A fun social platform for hackers to solve interesting puzzles, build quick hacks, code game bots and collaborate to solve real-world challenges.
Project Euler is a series of challenging mathematical/computer programming problems that will require more than just mathematical insights to solve.
There is a mathematical focus and has good examples of why some problems need optimized algorithms. You get exposed to a lot of cool math concepts and are challenged to write in efficient time and space complexity.
Most users think Project Euler is a great LeetCode alternative.
I haven't used HackerRank yet, but Codewars is the most similar to LeetCode in terms of having a large library of problems you can solve in multiple different languages. It's a lot more focused on being crowd-sourced though so it has a larger library and the solutions aren't paywalled like in LeetCode
BitDegree is a gamified platform for gaining Web3 skills while earning rewards. Complete fun tasks to get prizes from top crypto brands.
BitDegree is the most popular Self-Hosted alternative to LeetCode.
AceCoder is an invisible desktop app that instantly delivers solutions to any coding interview question.
AceCoder is the most popular Windows & Mac alternative to LeetCode.
CodinGame is a challenge-based training platform for programmers where you can play with the hottest programming topics.
Free AI-powered Chrome extension for LeetCode that provides intelligent coding hints, FAANG-style mock interviews, and auto-generated study notes with spaced repetition.
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...
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 LeetCode.
United States
Lithuania
EU
United Kingdom
France
A little more mathy. Instead of submitting a bit of code you actually submit the answer to a problem that should be solved through code. But it's free and unpaywalled so it's a cool little project. Currently around 760 problems