
LeetCode
CSSBattle
Exercism
CodeSignal
Codewars
HackerRank
Coderbyte
Explore and attempt front-end coding challenges.

Codechef
LeetCode
HackerRank
Codewars
AlgoExpert.io
Coderbyte
CodeForces
The Topcoder home page has received a slick new makeover that lets new customers quckly login, discover the power of our community, and launch challenges.

Which is more popular?
Based on our record, Topcoder should be more popular than Codier. It has been mentioned 6 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | codier.io | topcoder.com |
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What each product offers, as listed by its team.


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An editorial look at what each product does well and who it suits.


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Why this product is good
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Kufatec Codier-Dongle / Active Lane + Dynamic Light Assist - Das Golf 7 Projekt #3
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Difference between HackerRank, LeetCode, topcoder and Codeforces
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External articles and on-site reviews we used to compare the two products.


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What are LeetCode and LeetCode alternatives good for?LeetCode💡Interested in leveling up your career? Apply to the Formation Fellowship...
Topcoder is a platform where companies and employers can go to get developers who can work on their projects. The platform offers crowdsourcing services where several developers can work together to complete your task.
TopCoder is one of the original platforms for competitive programming online. It provides a list of algorithmic challenges from the past that you can complete on your own directly online using their code editor. Their...
Recommendations tracked on public social media and blogs since March 2021.


2.Codier This is also same a before but little different like you can view the other developers solution and task are very little and large also. Https://codier.io/. - Source: dev.to / almost 4 years ago
Codier is the free platform where each project you choose has instructions that you must follow and once you completed the project, you can submit your solution and others could rate it. Codier. - Source: dev.to / about 4 years ago
TopCoder: Features algorithm and development competitions. - Source: dev.to / about 2 years ago
Leetcode.com for problem solving practice. Do basics first before jumping into this one. Similar thing you can do at topcoder.com for trying to code with a timer. Great for problem solving practice. Source: over 3 years ago
I know topcoder.com does competitive programming for $$, I haven't done it myself though so I'm not entirely sure how it works. Source: over 3 years ago
When comparing Codier and Topcoder, you can also consider the following products.

Practice and level up your development skills and prepare for technical interviews.
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CodeChef is a not-for-profit educational initiative by Directi, an Indian software company. It is a global programming community that fosters learning and friendly competition, built on top of the world’s largest competitive programming platform.
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Download and solve practice problems in over 30 different languages.
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HackerRank is a platform that allows companies to conduct interviews remotely to hire developers and for technical assessment purposes.
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CodeSignal is the leading assessment platform for technical hiring.
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