octree.io is described as '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' and is an website. There are nine alternatives to octree.io, not only websites but also apps for a variety of platforms, including Self-Hosted, SaaS, Docker and Mac apps. The best octree.io alternative is LeetCode, which is free. Other great sites and apps similar to octree.io are HackerRank, AceCoder, Memoized and Codechef.
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.
United States
A fun social platform for hackers to solve interesting puzzles, build quick hacks, code game bots and collaborate to solve real-world challenges.
United States
AceCoder is an invisible desktop app that instantly delivers solutions to any coding interview question.
United Kingdom
Memoized is an open-source platform for preparing coding interviews with a focus on JavaScript and TypeScript.
Croatia
EU
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.
India
AI-powered interview preparation platform with structured learning paths, coding practice, system design, and mock interviews.
Take-Home Coding Assignments That Provide Real Insights. Identify great candidates using real tasks, not brainteasers. Streamline your tech recruiting workflow and make better hiring decisions.
Russia
