# LeetCode

> LeetCode is an online coding practice and technical interview platform. It combines runnable problems, study plans, explanations, contests and discussions for developers and candidates, then sells premium preparation features and online interviewing tools.

- **Founded:** 2011
- **Headquarters:** Palo Alto, United States
- **Founders:** Winston Tang (Founder), Hercy Chang (Co-founder and CEO)
- **Products:** Problemset and code judge, Study Plans and Explore, Contests and Daily Challenge, LeetCode Premium, LeetCode Interview
- **Notable:** More than 100 million annual code submissions reported in 2021., Hundreds of paying corporate users reported in 2021., Expanded with a separately operated Chinese site amid demand in 2018.

## Products & services

- **Problemset and code judge** — Coding, algorithm and database problems with in-browser submission, tests, solutions and discussion.
- **Study Plans and Explore** — Curated learning paths and topic-based instructional cards.
- **Contests and Daily Challenge** — Weekly competitions and a daily problem with profiles, rankings and badges.
- **LeetCode Premium** — Paid access to exclusive questions and explanations, company filters, interview simulations and other practice tools.
- **LeetCode Interview** — Browser-based collaborative coding interviews and real-time evaluation for hiring teams.
- **Ask Leet** — AI assistance for hints, examples, debugging and code improvement.
- **System Design for Interviews and Beyond** — A structured system design interview course.

## Achievements

- More than 100 million annual code submissions reported in 2021.
- Hundreds of paying corporate users reported in 2021.
- Expanded with a separately operated Chinese site amid demand in 2018.

## Latest updates

- **2026-08** — LeetCode described customizable instructions for its Ask Leet AI companion.
- **2025-10** — LeetCode introduced Ask Leet for hints, debugging, examples and code improvement, with additional monthly credits for Premium members.
- **2023-05** — LeetCode introduced updated Study Plan features with topic-grouped problems and progress tools.

## Links

- Website: https://leetcode.com/
- LinkedIn: https://www.linkedin.com/company/leet-code/
- Twitter/X: https://twitter.com/leetcode
- GitHub: https://github.com/LeetCode-OpenSource
- Facebook: https://www.facebook.com/LeetCode

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Profile page: https://yespress.io/leetcode
Published by YesPress — https://yespress.io
Last updated: 2026-09-30