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Power your product notifications with Segment and Hightouch.

LeetCode
Codility
CodeSignal
iMocha
HackerEarth
Codewars
TestGorilla
HackerRank is a platform that allows companies to conduct interviews remotely to hire developers and for technical assessment purposes.

Which is more popular?
Based on our record, HackerRank should be more popular than Knock App. It has been mentioned 67 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | knock.app | hackerrank.com |
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What each product offers, as listed by its team.


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Why this product is good
Recommended for
HackerRank is recommended for students, individual learners, and job seekers looking to improve their coding skills, as well as for companies seeking an efficient way to evaluate candidates' technical abilities during the hiring process.
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External articles and on-site reviews we used to compare the two products.


Knock is the most powerful notification system, capable of scaling with the users’ demands. Its unified API effortlessly handles the most complex of use cases and offers flexibility in providing user engagement,...
What are LeetCode and LeetCode alternatives good for?LeetCode💡Interested in leveling up your career? Apply to the Formation Fellowship...
HackerRank’s challenges cover a wide range of topics and difficulty levels, allowing developers to enhance their problem-solving skills and learn new algorithms and data structures. The competitive nature of...
HackerRank offers a wide array of challenges across various domains such as algorithms, mathematics, SQL, and functional programming. Its interface is user-friendly, and the platform provides detailed feedback on...
Recommendations tracked on public social media and blogs since March 2021.


Hey HN, I'm Chris, CTO of Knock (https://knock.app). We built email.info because every developer we talk to asks the same question: which email provider should I use? The existing resources are mostly vibes — "Best of" listicles,... - Source: Hacker News / 6 months ago
And if you wanna buy over build, check out https://knock.app - also built in elixir. - Source: Hacker News / about 1 year ago
Knock is a notification infrastructure platform with built-in localization support. When you attach a locale to a user object, Knock automatically handles localizing your notification templates when provided with the appropriate... - Source: dev.to / over 1 year ago
This way, you transfer what you already know (problem-solving) but only change the syntax. Platforms like Hackerrank are also great to solve the same problem in different languages and learn from other people’s solutions. - Source: dev.to / about 1 year ago
Firstly, solve some common data structure problems with it. Implement some data structures like arrays, linked lists, stacks, queues, etc. You can check common problems on LeetCode, Hackerank or some other resources. - Source: dev.to / over 2 years ago
I don't have a consecutive internet connection and I can't keep up learning process so I started practicing in hackerrank.com I have started some challenges in python and c++ there. Thus I have no internet connection so I cannot practice... Source: almost 3 years ago
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