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| type = [[Privately held company|Private]]
| industry = Software
|owner = Leetcode LLC
| founded = 7 August 2015
| founder = Winston Tang
| location_city = [[Palo Alto]], [[California]]
| location_country = [[United States|US]]
| key_people = Hercy Chang (CEO)
| num_employees = 264 (2025)<ref>[https://leadiq.com/c/leetcode/5a6861465700003b015b2278/employee-directory LeetCode Employee Directory, Headcount & Staff] ''LeadIQ''</ref>
|revenue = US$8 million<ref>[https://siliconvalleyjournals.com/company/leetcode LeetCode: Contact Details, Revenue, Funding, Employees and Company Profile]
''Silicon Valley Journal''</ref> (2024)
| website = * {{official website|2=leetcode.com}}
* {{official website||2=leetcode.cn}} (in Chinese)
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Additionally, LeetCode provides its users with mock interviews and online assessments. LeetCode hosts weekly and biweekly contests, each having 4 problems.<ref name="dummies" /><ref name="LeetCodeWebsite">{{Cite web |title=LeetCode - The World's Leading Online Programming Learning Platform |url=https://leetcode.com/ |access-date=2023-10-10 |website=leetcode.com}}</ref> After participating in a contest for the first time, one gets assigned a ranking, which can be found in their profile.<ref>{{Cite web |title=Contest |url=https://leetcode.com/contest/ |access-date=2023-10-10 |website=LeetCode |language=en}}</ref> LeetCode also provides its users with daily challenges, following UTC, with a lucky draw at the end of each month for those who stayed consistent for the month.<ref>{{Cite web |title=What is Daily LeetCoding Challenge?|url=https://leetcode.com/discuss/general-discussion/655704/ |access-date=2023-12-09 |website=leetcode.com}}</ref>
LeetCode supports a wide range of programming languages, including [[Java (programming language)|Java]], [[Python (programming language)|Python]], [[JavaScript]], and [[C (programming language)|C]].<ref>{{Cite book |last=Nguyen |first=Nhan |title=Proceedings of the 19th International Conference on Mining Software Repositories |last2=Nadi |first2=Sarah |date=2022-10-17 |publisher=Association for Computing Machinery |isbn=978-1-4503-9303-4 |series=MSR '22 |___location=New York, NY, USA |pages=1–5 |chapter=An empirical evaluation of GitHub copilot's code suggestions |doi=10.1145/3524842.3528470 |quote=LeetCode questions come with test cases in various programming languages, ... (Python, Java, JavaScript, and C) |doi-access=free}}</ref> In September 2024, LeetCode China supports [[Huawei]]'s {{ill|Cangjie programming language|zh|仓颉编程语言}} for all problems.<ref>{{Cite web |title= |script-title=zh:编程刷题平台 LeetCode 力扣所有题目均已支持华为仓颉语言 |trans-title=All problems on the programming practice platform LeetCode are now supported in Huawei's Cangjie language |url=https://www.sohu.com/a/809062659_114760 |access-date=2024-12-03 |website=[[Sohu]]}}</ref>
The platform features forums where users can engage in discussions related to problems, the interview process, and share their interview experiences.<ref name="dummies" />
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== History ==
LeetCode was founded in Silicon Valley in 2015 by Winston Tang.<ref>{{Cite web |title=Secretary of State |url=https://bizfileonline.sos.ca.gov/search/business |access-date=2024-03-21 |website=bizfileonline.sos.ca.gov}}</ref><ref name=":1">{{Cite web |last=Curry |first=Rachel |date=2024-06-24 |title=AI is shaping the fate of software engineers, but there is a new way to succeed |url=https://www.cnbc.com/2024/06/24/ai-shaping-fate-of-software-engineers-but-there-is-new-way-to-succeed.html |access-date=2024-06-26 |website=CNBC |language=en}}</ref> After moving to the US from Malaysia in 2005, Tang founded the company, citing his own experiences working at Amazon and Google as inspiration.<ref>{{Cite web |last=Tang |first=Winston |title=AI cannot replace software engineers—take it from someone who fought to become one and now helps others pursue the career |url=https://fortune.com/2024/07/30/ai-cannot-replace-software-engineers-or-threaten-their-careers/ |access-date=2024-07-31 |website=Fortune |language=en}}</ref><ref name=":1" />
LeetCode expanded its operations to China in 2018, providing Chinese problems, solutions and forums on its Chinese website ''Likou'' ({{Zh|c=力扣|p=Lìkòu}}).<ref name="yicai">{{Cite web |last=Shumin |first=Liao |title=IT Job Interview Prepper LeetCode Pockets USD10 Million From Lightspeed China |url=https://www.yicaiglobal.com/news/it-job-interview-prepper-leetcode-pockets-usd10-million-from-lightspeed-china |access-date=2023-08-16 |website=www.yicaiglobal.com |language=en}}</ref> In 2021, LeetCode secured its first round of funding, receiving a $10 million investment from [[Lightspeed China Partners]].<ref name=yicai/>
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