Top 25 websites for coding challenge and competition [Updated for 2021]

1

HackerEarth

HackerEarth is a popular coding platform that features over 8000 questions, 2000 challenges, and 1000 hackathons. It is also trusted by hiring managers across 1000+ companies. This platform has a thriving community of 3 million developers.

#Hiring And Recruitment #Online Learning #Online Education 3 social mentions

2

HackerRank

HackerRank is a hiring platform that is the de facto for evaluating developer skills for over 2,000 companies around the world. By enabling tech recruiters and hiring managers to objectively evaluate talent at every stage of the recruiting process, HackerRank helps companies hire skilled developers and innovate faster.

#Online Education #Online Learning #Hiring And Recruitment 66 social mentions

3

Exercism.io

Best qualities: Exercism starts off with language tracks that allow users to choose their preferred languages. Moreover, there are human mentors who will check your code and help you improve as you progress. This makes the platform perfect for total beginners who want to deepen their understanding of a new programming language.

#Online Learning #Online Education #Online Courses 298 social mentions

4

Spoj

Best qualities: SPOJ has tons of mind-boggling coding challenges that will really test your skills. There are contests as well for you to participate in to showcase your skills.

#Online Education #Online Learning #Online Courses 1 social mentions

5

Programmr

Programmr is an online interactive platform for anyone to learn and practice coding. They believe that the best way to learn is at your own pace in a self-taught environment. Programmr claims to make the world’s best coding simulators, where you can code and run all kinds of programs.

#Online Learning #Online Education #Education & Reference

6

Topcoder

TopCoder is a competitive programming platform. It provides a collection of algorithmic challenges that you can tackle in their own personal code editor. There’s always challenges up and running on the website and you can always participate if you’re up for it.

#Online Education #Online Learning #Coding 5 social mentions

7

CodeForces

CodeForces is a collaborative platform where coders can participate in “rounds” where a time limit is set and points are distributed to the participants. CodeForces also has contests, problem sets as well as groups for coders to have at it.

#Programming #Coding #Coding Games 74 social mentions

8

Codewars

Codewars is a well-designed platform where users work together to create challenges. There are two groups of people making it work, the creators who authorize kata to teach various techniques, solve kata with solutions that enlighten others, and comment with constructive feedback, and the leaders will moderate the content and community.

#Online Learning #Online Education #Online Courses 160 social mentions

9

Codechef

Best qualities: CodeChef has is one of the biggest competitive programming platforms. They open their platform for anyone to host programming contests and a feature called campus chapter as a tool for programming clubs to utilize. They also host 3 contests each month where prizes are given.

#Online Education #Hiring Tools #Programming Tools 7 social mentions

10

CodeGym.cc

#Education #Online Learning #Code Collaboration 34 social mentions

11

CodePen

CodePen is a cool online IDE that allows you to write code in your browser and see the result just as you build it. CodePen challenges is a place for leveling up your skills by building things. Each week, new challenges appear for you to tackle, and the best “Pens” get picked.

#Text Editors #Programming #Code Collaboration 484 social mentions

12

CodinGame

Best qualities: CodinGame helps people learn coding in the form of games, allowing them to learn the fun way. Developers can also ask for help from mentors to review their codes and compare solutions with each other.

#Online Learning #Online Education #Online Courses 45 social mentions

13

LeetCode

Best qualities: LeetCode has an explore tool that helps programmers progress towards the next step in their programming career. LeetCode prepares them for technical interviews, and are involved in helping companies hire top talents as well.

#Online Education #Online Learning #Online Courses 515 social mentions

14

GeeksforGeeks

GeeksForGeeks is the website for geeks. It has tons of resources on programming and algorithms. It also has an interview section to help programmers win their dream jobs. There’s also an excellent collection of C and C++ puzzles for programmers to solve.

#Education #Online Learning #Online Education 24 social mentions

15

Project Euler

If you are studying algorithms and computer programming, chances are you’ve heard of Project Euler. A collection of mathematical problems made for problem solvers who are interested to combine mathematics and programming, Project Euler requires the use of mathematics to form algorithms and arrive at efficient solutions, and computer programming to actually solve it. These problems range in difficulty and they are not a walk in the park.

#Online Learning #Online Education #Programming 405 social mentions

16

URI Online Judge

The URI Online Judge is developed by the Computer Science Department of URI University. The main goal of the project is to provide programming practice and knowledge sharing. Their website has a friendly UI and it contains more than 1000 problems divided in 8 big categories, solved with 11 languages.

#Programming #Coding #Learn To Code

17

Reply Challenges

Reply Challenges is a series of challenges designed by “Replyers” and open to anyone who loves technology and online competitions. Reply Challenges are all about having fun and showcasing talent in areas like coding, cybersecurity, creativity, and investments. There are lucrative prizes for each challenge as well — Macbook Pro 16, Airpods Pro, etc. Challenges are open to students and professionals.

#Contests #Coding #Learn To Code

18

Google's Coding Competitions

#Coding #Coding Games #Contests 5 social mentions

19

Kaggle

Kaggle is famous for being the place where data scientists collaborate and compete with each other. But they also have a platform called Kaggle Learn where micro-courses are provided. They are mini-courses where data scientists can learn practical data skills that they can apply immediately. They call it the fastest (and most fun) way to become a data scientist or improve your current skills. Courses available are — Python, Pandas, SQL, and, Data Visualization.

#Data Collaboration #Data Dashboard #Databases 99 social mentions

20

SoloLearn

SoloLearn is one of the best places to learn how to code, with over 39 million learners, 1784 lessons, and 14k quizzes. I started learning how to code HTML and CSS on this website and it’s amazing.

#Online Learning #Online Courses #Online Education 15 social mentions

21

Geektastic

Geektastic differentiates themselves from other platforms because they also offer Peer Reviewed Take Home challenges which are reviewed by experts from companies including Google and Amazon.

#Hiring And Recruitment #Technical Computing #Candidate Screening And Assessment

22

Codingbat

CodingBat is a free site of live coding problems to build coding skill in Java and Python (example problem). CodingBat is a project by Nick Parlante, a computer science lecturer at Stanford.

#Online Learning #Online Education #Coding 68 social mentions

23

CodeSignal

CodeSignal has a technical interview practice that helps you get ready for technical interviews by completing real-world assessments in an advanced IDE. It starts with customizing a personal study plan, then helps you master key topics by solving real-world questions.

#Online Learning #Hiring And Recruitment #Online Education 25 social mentions

24

Edabit

Edabit is a new coding platform that features interactive tutorials in JavaScript (with Python and C# coming soon) and challenges in C#, Java, JavaScript, PHP, Python, Ruby and Swift. It’s the fastest, easiest, most addictive way to learn.

#Online Learning #Online Education #Online Courses 56 social mentions