
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.

Mendeley
Qiqqa
JabRef
Zotero
Citavi
BibDesk
Papers
Docear

Which is more popular?
Based on our record, HackerRank seems to be a lot more popular than Docear. While we know about 67 links to HackerRank, we've tracked only 4 mentions of Docear.
Website, pricing, platforms and company facts side by side.
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| Website | hackerrank.com | docear.org |
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What each product offers, as listed by its team.


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


Overall verdict
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.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Is HackerRank A Good Idea?
More videos
Docear: How to organise your literature?
More videos
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using HackerRank and Docear. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


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...
Docear is one of the most unique and powerful reference management tools that helps researchers manage their references and PDFs. It integrates a number of features, such as PDF management, reference management, mind...
Recommendations tracked on public social media and blogs since March 2021.


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
I use sometimes docear https://docear.org because of JabRef interaction. You can drag and drop pdfs and see comments, highlights etc. The mindmap tool is freeplane. Source: over 4 years ago
Docear : https://docear.org/ (comparison page with similar software) "Recommender Systems Handbook" with source code : https://link.springer.com/book/10.1007/978-0-387-85820-3. - Source: Hacker News / over 4 years ago
Well for PC I use docear software… haven’t used that in years but I know it’s useful for grad students… https://docear.org/. Source: almost 5 years ago
When comparing HackerRank and Docear, you can also consider the following products.

Practice and level up your development skills and prepare for technical interviews.
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Easily organize your papers, read & annotate your PDFs, collaborate in private or open groups, and securely access your research from everywhere.
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Codility provides a SaaS platform with advanced validation, security and protection features to evaluate the skills of software engineers.
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Qiqqa is a free research and reference management software. It can be used in many organizational projects from the academic to the personal to the business endeavor. Read more about Qiqqa.
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CodeSignal is the leading assessment platform for technical hiring.
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Graphical Java application for managing bibtex (. bib) databases.JabRef · JabRef Help · JabRef | Blog · OpenOffice/LibreOffice .
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