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

The Dude
Pandora FMS
cStatus
Trafikito
Advanced Host Monitor
CloudView NMS
SevOne
Project home page of OpenNMS - a java based network managememnt platform developed under the Open Source model

Which is more popular?
Based on our record, HackerRank seems to be a lot more popular than OpenNMS. While we know about 67 links to HackerRank, we've tracked only 1 mention of OpenNMS.
Website, pricing, platforms and company facts side by side.
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| Website | hackerrank.com | opennms.com |
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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
OpenNMS is recommended for IT professionals, network administrators, and businesses that require scalable and customizable network monitoring solutions. It is suitable for organizations with varying levels of network complexity and those that value the flexibility and community support that come with open-source software.
Walkthroughs and reviews on video.
Is HackerRank A Good Idea?
More videos
OpenNMS 101 - Module 6: SNMP Review
More videos
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using HackerRank and OpenNMS. 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...
OpenNMS earns our recommendation for its extensive support for monitoring solutions and systems, making it a versatile choice for organizations with diverse monitoring needs. The partnership with larger companies...
OpenNMS got built-in reporting, which means you can view the report in a beautiful dashboard and chart. Overall, OpenNMS got an excellent user interface.
For example, there are many other open source monitoring tools that exist such as OpenNMS, Cacti, and Zennos and you have to consider the benefits of each one from the perspective of your requirement.
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
Up until recently, I was at OpenNMS, an open source network monitoring project that was Doing It Right™ for a very long time, even with a commercial component. However, since being acquired, it has kind of lost its direction as it... - Source: dev.to / over 2 years ago
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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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Pandora FMS: Opensource monitoring software
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