LeetCode is a leading platform for algorithm practice and interview preparation. The list below showcases 20 comparable services that provide coding challenges, contests, skill assessments, and learning pathways for developers of all levels.
Get targeted exposure with custom position pinning and highlighted placement.
Extensive library of coding challenges, interview prep kits, and skill certifications across algorithms, AI, databases, and more.
Competitive‑programming community with regular contests, problem archives, and a rating system that tracks progress.
Assessment‑focused platform offering arcade challenges, interview practice, and AI‑driven skill scoring.
Learn programming by solving puzzles that produce visual games; supports many languages and multiplayer contests.
Japanese‑origin competitive‑programming site with weekly contests and a clean problem archive.
One of the oldest platforms offering algorithm contests, marathon matches, and real‑world freelance gigs.
Curated interview‑question paths, mock interviews, and a community‑driven discussion board.
Indian‑based competitive‑programming site with monthly contests, practice problems, and a strong community.
Mentor‑driven practice tracks for over 50 languages, focusing on code reviews and incremental improvement.
Beginner‑friendly bite‑size challenges that unlock as you solve, with gamified streaks and leaderboards.
Library of algorithm challenges, interview prep courses, and built‑in code editor with real‑time feedback.
Kata‑style challenges ranked by difficulty; community solutions and discussions help deepen understanding.
Mathematics‑oriented problem set that encourages algorithmic thinking and efficient coding.
Data‑science competition platform offering notebooks, datasets, and micro‑challenges for Python/R coders.
Technical assessment platform with timed coding tasks, useful for interview practice and hiring tests.
Practice portal with algorithm challenges, hackathons, and company‑specific interview kits.
Massive repository of coding problems, tutorials, and interview experiences across all major topics.
Curated set of 160+ interview‑style problems with video explanations, visualizations, and a built‑in IDE.
Gamified learning platform offering daily challenges, streak tracking, and community leaderboards.