TL;DR - LeetCode
- 3,000+ coding problems for technical interview preparation
- Company-tagged questions and weekly coding contests
- Free to use; Premium at ~$35/mo or $159/year
Pricing: Free plan available
Best for: Growing teams
4.2/5 across review platforms
Pros & Cons
Pros
- Largest and most relevant problem set for FAANG-style interviews
- Company tags show exactly which problems each firm asks
- Active community provides multiple solution approaches per problem
- Contest system builds speed and accuracy under pressure
- Free tier covers thousands of problems with no paywall
- In-browser editor eliminates local setup
Cons
- Premium subscription required for company-specific frequency sorting
- Problem difficulty ratings can be inconsistent
- Editorial solutions are sometimes hard to follow without video
- Focuses almost entirely on algorithms, limited system design coverage
- Can encourage rote memorization over deep understanding
Ratings Across the Web
4.2(18 reviews)
Ratings aggregated from independent review platforms. Learn more
Key Features
3,000+ coding problems across easy, medium, and hard difficultyIn-browser IDE supporting 20+ programming languagesCompany-tagged questions showing which firms ask each problemWeekly and biweekly coding contests with global leaderboardsDiscussion forums with community solutions and explanationsPremium solution videos and detailed editorial explanationsStudy plans and curated problem lists (e.g., Blind 75, NeetCode 150)Mock interview simulator with timed sessionsSQL and database practice problemsProgress tracking and streak statistics
Pricing
Freemium
LeetCode offers a generous free tier with optional paid upgrades for advanced features.
What is LeetCode?
LeetCode is the leading platform for practicing coding interview questions, used by millions of software engineers preparing for technical interviews at companies like Google, Meta, Amazon, and Microsoft. It offers over 3,000 algorithmic and data structure problems across difficulty levels, with an in-browser code editor supporting 20+ programming languages. LeetCode Premium unlocks company-specific question sets, solution videos, and sorting by interview frequency. Beyond interview prep, it hosts weekly coding contests and maintains discussion forums where engineers share approaches and optimizations.
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LeetCode FAQ
Is LeetCode free to use?
Yes. The free tier includes access to all 3,000+ problems, community discussions, and weekly contests. Premium adds company-tagged frequency data, video solutions, and enhanced editor features.
What programming languages does LeetCode support?
LeetCode supports 20+ languages including Python, Java, C++, JavaScript, TypeScript, Go, Rust, Ruby, Swift, Kotlin, and SQL for database problems.
How should I use LeetCode to prepare for interviews?
Most engineers follow curated lists like the Blind 75 or NeetCode 150, which cover the most common patterns. Aim to solve 2-3 problems daily, focusing on understanding patterns rather than memorizing solutions.
What is the difference between LeetCode and HackerRank?
LeetCode focuses on individual interview prep with company-tagged problems. HackerRank primarily serves employers who use it as a hiring assessment platform, though it also has practice challenges for developers.
Are LeetCode problems actually asked in interviews?
Yes. Many LeetCode problems are sourced from real interview questions. The Premium company tags indicate which problems each company has asked, based on community-reported data.
Does LeetCode help with system design interviews?
LeetCode has limited system design content. For system design preparation, most engineers supplement with resources like Grokking the System Design Interview or System Design Primer.
Source: leetcode.com