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Python Algorithms
A comprehensive collection of all algorithms implemented in Python, suitable for learning and teaching purposes.
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6 Open Source Alternatives to LeetCode
Looking for an open-source alternative to LeetCode? Below are 6 community-built tools that offer similar functionality — all free, open source, and ready to use or self-host. Ranked by GitHub stars.
195.8k
JavaScript Algorithms
A comprehensive collection of algorithms and data structures implemented in JavaScript, complete with explanations and additional reading links.
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Curated coding interview preparation materials for busy software engineers, covering essential topics, challenges, and tips.
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A collection of coding articles and snippets that help you enhance your development skills quickly and efficiently.
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Comprehensive collection of algorithms and data structures implemented in JavaScript, designed for beginners and following best practices.
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Enhance your technical interview preparation with a comprehensive map covering JavaScript, networking, browser technologies, performance optimization, security, frameworks, Git, data structures, and algorithms.
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Frequently asked questions
What are the best open-source alternatives to LeetCode?
The top picks from this list are Python Algorithms, JavaScript Algorithms, Tech Interview Handbook — all maintained, free to use, and self-hostable.
Are these alternatives to LeetCode free?
Yes. Every tool listed here is open source and free to use. Many can be self-hosted on your own infrastructure, which means no subscription fees and full control over your data.
Can I self-host an alternative to LeetCode?
Most of the alternatives listed are self-hostable. Check each tool's page for hosting details, system requirements, and licensing terms.
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