Sites and apps similar to LeetCode include Codecademy, which has a free version. Other options are exercism, Codewars, HackerRank and Project Euler. Code Learning Services like LeetCode are a crowded field, with more than 50 alternatives for Windows, Mac, Android, self-hosting and iPhone.
System Overflow provides structured system design interview preparation content, including high-quality diagrams, design breakdowns, and experience-level guidance for software engineers preparing for technical interviews.
Practice coding for free with hundreds of real-world problems that strengthen your problem-solving and algorithmic thinking skills. Explore challenges across different topics, learn new techniques, and grow your confidence as a programmer.
PracHub is a technical interview preparation platform for software engineers, data scientists, product managers, and other tech candidates. It provides 8,500+ real interview questions from 400+ companies, organized by company, role, difficulty, and topic.
Evaluate is a developer screening platform with pre-made tests that include programming and theory. Fully free until the end of 2020.
Generative AI-powered skills assessment, talent intelligence & pre-employment testing platform designed to reduce bad hires fast.
India
Nyrion is a focused practice environment for the new wave of AI-assisted coding interviews — the format that Meta, Shopify, LinkedIn, Canva, and Rippling rolled out in late 2025.
United States
Calcora is a free platform for practicing olympiad-style math problems of all difficulty levels. Solve problems, maintain your streak, and compete with friends on the leaderboard.
Austria
EU
People frequently come to us asking for help with technical coding interviews. Many of us solve algorithmic coding puzzles for fun, and we’ve noticed a few things that make the process easier.
kodwai is a platform where developers solve real coding challenges on their own machine with their own AI coding agent (Claude Code, Cursor, or Codex) and get scored on how well they direct the agent, across three axes: Direction, Outcome, and Lift.
Türkiye
Xobin is an AI based Tech Hiring Platform for Secure Assessments and Collaborative Interviews enabling enterprises to build teams 4X faster.
India
DataLemur is a FREE SQL & Data Science Interview platform, used by thousands of Data Analysts & Data Scientists to prep for their technical interviews at companies like Amazon, Google, and Microsoft.
OnSite provides AI-powered interview practice that mirrors real hiring scenarios across 19 roles. Candidates train with adaptive simulations for software engineering, finance, consulting, marketing, design, and HR, and receive instant, role-specific feedback and analytics.
Australia
