freeCodeCamp
Free
A free nonprofit with full coding curricula, projects and certifications.
All tools
LeetCode
Coding Education
Freemium
The popular platform for practicing coding interview problems, with AI hints and explanations.
About LeetCode
LeetCode hosts thousands of algorithm and data structure problems that developers use to prepare for technical interviews. You write solutions in many languages and get instant feedback on correctness and speed.
Contests, company-tagged question lists and discussion threads help you prepare for specific employers. AI features give hints, explain solutions and help debug your code.
LeetCode has a free tier and a Premium subscription. It is the standard practice ground for software job seekers.
Standout features
- Thousands of problems
- Many languages
- Contests
- Company question lists
- AI hints and explanations
- Discussion forums
Tags
More in Coding Education
View all →Educative
Paid
Text-based interactive courses for developers, including interview prep and AI skills.
SoloLearn
Freemium
A community-driven coding app with short lessons, practice and an AI helper.
Mimo
Freemium
A mobile-friendly app that teaches coding in bite-sized lessons with AI help.
Boot.dev
Freemium
Backend development courses turned into a game, with an AI teaching bear named Boots.
Scrimba
Freemium
Learn web development with interactive screencasts where you can edit the instructor's code.
