Most Popular Coding Challenge Websites in 2023

Compiled below are the most popular coding challenge websites with a short description of what each of them offers. Improve your coding skills by solving coding challenges.

Coding Challenge Websites

Improve your coding skills by solving coding challenges. Solving a coding problem is easy, but optimizing the solution takes time, and it comes through practice. It improves your thought process in approaching coding problems.

So, why do this? What are the benefits of doing coding problems? One of the top benefits is it prepares you for job interviews, learning new algorithms, etc.

Before prepping for interviews, you need to do the following 5 things.

1. Choose a programming language and learn the basics.
2. Data Structures – resources.
3. Problem Solving – choose a website or choose multiple sites from the following and start working on problems.
4. Complexity Analysis.

Compiled below are the most popular coding challenge websites, with a short description of what each of them offers.

1. LeetCode

Leetcode is the best platform to help enhance your skills, expand your knowledge and prepare for technical interviews. This platform has an active community where programmers talk to each other about solution approaches, time complexities, etc.

PROS/Benefits

1. Over 2200 questions for you to practice, with company labels and DS topics for easy reference.
2. They have problems with algorithms, databases, Shell, and concurrency.
3. They support 14 popular coding languages.
4. Curated Study plans on algorithms, data structure, and dynamic programming.
5. Weekly and Bi-weekly contests.
6. Huge active discussion forum, about interview experience, compensations, career, general discussion, etc.
7. Interview explore cards separated based on top tech companies like Google, Facebook, Amazon, Apple, Adobe, Bloomberg, Uber, Yelp, Microsoft, LinkedIn, etc.
8. Mock Assessments
9. Solutions and editorials with clear big-O explanations.

2. HackerRank

HackerRank is a technology hiring platform that is the standard for assessing developer skills for over 2,800+ companies around the world. By enabling tech recruiters and hiring managers to objectively evaluate the talent at every stage of the recruiting process, HackerRank helps companies hire skilled developers and innovate faster!

PROS/Benefits

1. 18+ million developers on the platform with 188 million code submissions.
2. They provide free certifications and are worth sharing on your profile and social media.
3. Skills available to practice are many, including algorithms, data structures, mathematics, C, C++, Java, Artificial Intelligence, SQL, Regex, etc.
4. Tailored free tutorials.
5. They support 14+ popular coding languages.
6. They support coding contests and leaderboards.

3. HackerEarth

This is for both normal problem solvers and competitive programmers. The HackerEarth way, creating the tech behind building great tech teams, has taught them that the key to real, lasting success is always the people. So they’ve built a culture of acceptance where introverts and extroverts, early birds and night owls, and left-brainers, as well as right-brainers, feel at home.

PROS/Benefits

1. Practice tons of problems with basic programming, data structures, algorithms, math, machine learning, python and interview prep, etc.
2. They have hackathons, programming challenges, and coding competitions.
3. Hiring Challenges, you can solve problems and get hired by the top companies.
4. Tailored free tutorials.
5. They support 14+ popular coding languages.
6. They support coding contests and leaderboards.

4. CodeChef

This is for both normal problem solvers and competitive programmers. CodeChef is a platform for aspiring programmers. CodeChef is known for its toughness in problems. One of the highest-rated among the coders and well known as the problem setters are doing an amazing job in curating the toughest problems on contests and for regular problem solvers to test the coder’s skill.

PROS/Benefits

1. Practice tons of problems with basic programming, data structures, algorithms, math, machine learning, python and interview prep, etc.
2. They have hackathons, programming challenges, and coding competitions.
3. Hiring Challenges, you can solve problems and get hired by the top companies.
4. This is a game-changer for competitive programmers.
5. They support 18+ popular coding languages.
6. They support coding contests and leaderboards.

5. CodeForces

This is for both normal problem solvers and competitive programmers. CodeForces is a platform for aspiring programmers. CodeForces is known for its toughness in problems. One of the second-highest-rated among the coders and well known as the problem setters are doing an amazing job in curating the toughest problems on contests and for regular problem solvers to test the coder’s skill.

PROS/Benefits

1. Practice tons of problems with basic programming, data structures, algorithms, math, machine learning, python and interview prep, etc.
2. They have a catalog explaining all the topics of competitive programming.
3. This is a game-changer for competitive programmers.
4. They support 18+ popular coding languages.
5. They support coding contests and leaderboards.

6. SPOJ

This is for both normal problem solvers and competitive programmers. SPOJ helps you become a true programming master. You can learn to code and build efficient algorithms by participating in coding challenges, contests, and discussions. SPOJ has some really nice curated problems. Most programmers love to solve them.

PROS/Benefits

1. Practice tons of problems with basic programming, data structures, algorithms, math, machine learning, python and interview prep, etc.
2. They have tutorials, with a detailed set of problems listed topic-wise.
3. This is a game-changer for competitive programmers.
4. They support coding contests and leaderboards.

7. Codewars

Codewars is an educational community for computer programming. On the platform, software developers trained in programming challenges are known as kata. These discrete programming exercises train a range of skills in a variety of programming languages and are completed within an online integrated development environment.

PROS/Benefits

1. Practice tons of problems.
2. Challenge yourself on kata, which is a small coding exercise. The community crafted each kata to help you strengthen different coding skills. Master your current language of choice, or expand your understanding of a new one.
3. Accelerate your technical hiring, upskilling, and certifications with the most advanced coding assessment platform.
4. They support coding contests and leaderboards.
5. Hiring Challenges, you can solve problems and get hired by the top companies.
6. Tailored free tutorials.
7. They support 20+ popular coding languages.
8. They support coding contests and leaderboards.

8. TopCoder

This is for both normal problem solvers and competitive programmers. TopCoder is a platform for aspiring programmers. TopCoder is known for its toughness in problems, with curated topic-wise problems and explanations.

PROS/Benefits

1. Practice tons of problems.
2. Curated topics on all competitive programming topics, including basics.
3. Editorials and discussion forum for sharing and collaborating with peer programmers.
4. They support coding contests and leaderboards.
5. Tailored free tutorials.
6. They support 20+ popular coding languages.
7. They support coding contests and leaderboards.

9. Structy.net

This is a paid platform, but it does the magic in learning all the data structures and algorithms easily with Alvin’s(Site owner) curated content.

Structy is a platform designed to maximize your understanding of data structure & algorithms by providing a sense of progression and continuity. They accomplish this with a curriculum that balances concept inertia and spaced repetition. The problem sequence of Structy forms a deliberate “course” designed to maximize retention while minimizing study time.

PROS/Benefits

1. Practice curated problems listed based on different approaches/patterns.
2. Covers all the data structures, introductions, and related problems.
3. Solutions are written in JavaScript, Python, and C++.

10. AlgoExpert.io

This is a paid platform, but it does the magic in learning all the data structures and algorithms easily with Clement and Tim Russica curated content.

AlgoExpert is the ultimate resource to prepare for coding interviews. Everything you need, in one streamlined platform. If you want to ace the coding interviews, being well-versed in all common data structures and popular problem-solving methods is paramount. With 160 questions, spanning 15 categories and 4 difficulty levels, they’ve got you covered.

PROS/Benefits

1. 160 Hand Picker with 100+ hours of video explanations.
2. Certificate of completion.
3. Data Structures crash course.
4. Solutions in 9 different languages.
5. Mock coding interviews.

11. BinarySearch

Binarysearch.com is a coding interview prep platform where you can solve problems live with friends. We started this project in 2020 to make preparing for interviews more fun and collaborative.

BinarySearch started new, but it caught the coder’s attention and this has been doing great with its curated problems and ability to create rooms and solve problems alongside fellow programmers.

PROS/Benefits

1. You can join a room or create and start a room and solve problems with fellow programmers.
2. Solve problems that are curated for practice.
3. 6 supporting languages.
4. Text and voice chat included.
5. It is absolutely free.

12. AlgoDaily

Algodaily is an online Bootcamp to land your dream job.

Join over 25K+ software developers who are doubling their salaries by finally mastering algorithms, systems design, and much more. Get hundreds of visual coding interview problems and lessons delivered as an interactive course or daily newsletter, for free.

TWO MODES OF LEARNING

View all course materials on the site as long-form articles in Article Mode for a familiar learning experience, or interactive slides in Interactive Mode for deeper engagement by going one screen at a time.

Courses Offered

Following are the courses offered by AlgoDaily.

1. Technical Interview Preparation.
2. Career advice for Software Engineers.
3. Coding Fundamentals and Patterns.
4. Data Structures and algorithms.
5. System design and architecture.
6. DevOps and SDLC.
7. Object-Oriented Programming.
8. Frontend engineering and JavaScript.
9. Machine learning fundamentals.
10. Interview cheat sheet by topic.
11. After landing the job offer.
12. Become a startup engineer.

PROS/Benefits

1. They have a wide range of courses available for just $79/year listed above.
2. Company-wise categorized interview questions.
3. Video solutions with a code editor.
4. They provide both Interactive and deeper engagement.
5. 8 supporting languages.
6. Text and voice chat included.
7. It is absolutely free to sign-up.

13. AlgoCademy

Algocademy is another coding platform that teaches you, step by step, by going through the algorithm.

AlgoCademy helps you translate ideas into code, guiding you step by step, thus making the whole learning experience more interactive than just following a video lesson and copying what is presented there.

A picture is worth a thousand words. But a video offers you more than that. AlgoCademy’s video content doesn’t just hand you over the solution, it will get you on a thinking process adventure where you will easily develop your problem-solving skills. You’ll be able to solve any problem you’ll face during an interview.

PROS/Benefits

1. Optimized for Coding Interviews.
2. Performance Validation.
3. Learn how to write a Clean Quality Code.
4. Step by Step Coding Tutorials.
5. Video Content.
6. Develops your Thinking Process and Problem-Solving Skills.
7. Code Quality Validation.
8. Optimized Problem Set for fast Learning Curve.
9. Exploring Every Solution to a Problem