HackerRank
Real Dev
Daily Coding Problem
CodinGame
Frontloops
Codewars
Code Racer
No nonsense, real world programming challenges

Real Dev
Interviews on Skype
Daily Coding Problem
HackerRank
AlgoExpert.io
Takehome
Interviewlab
Prepare for tech interview with friends

Which is more popular?
Based on our record, hackattic seems to be more popular. It has been mentioned 3 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | hackattic.com | coderslang.com |
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What each product offers, as listed by its team.

Possible disadvantages
Possible disadvantages
How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using hackattic and Coderslang. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.

I am aware of few of the resources which I've listed down below, will appreciate if you guys can share bit more. - https://hackattic.com/ : Interesting programming Problems. - Source: Hacker News / over 3 years ago
Also check out https://hackattic.com/ it has some really fun problems. - Source: Hacker News / about 4 years ago
What sort of programming would you like to do? Any real world challenges you are looking to solve? For practice “challenges” I really like https://hackattic.com/. Source: over 5 years ago
Tracking Coderslang since Mar 2021.
When comparing hackattic and Coderslang, you can also consider the following products.

HackerRank is a platform that allows companies to conduct interviews remotely to hire developers and for technical assessment purposes.
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Test candidates using a real-time code editor over Skype
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Get exceptionally good at coding interviews
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CodinGame provides users with a fun and effective way to learn coding that eschews the rigid structure of traditional teaching methods.
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Level up your frontend skills with handcrafted tasks
Compare Frontloops to hackattic or Coderslang: