
Codecademy
Exercism
LeetCode
Treehouse
edX
Coursera
Udemy
Achieve code mastery through challenge.

Jupyter
Wolfram Notebooks
Apache Zeppelin
Observable Notebooks
Zasper
SnippetsLab
Kaggle
The polyglot notebook with first-class Scala support.
Which is more popular?
Based on our record, Codewars seems to be a lot more popular than Polynote. While we know about 160 links to Codewars, we've tracked only 1 mention of Polynote.
Website, pricing, platforms and company facts side by side.
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| Website | codewars.com | polynote.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
Codewars is recommended for beginner to advanced programmers who enjoy learning through practice and are interested in improving their algorithmic thinking and coding skills in a gamified environment. It is particularly beneficial for those preparing for coding interviews or seeking to reinforce their programming knowledge in a fun and interactive way.
No analysis of Polynote yet.
Walkthroughs and reviews on video.
Codewars Review & Tips
More videos
Netflix- Polynote
How often each product is chosen within a category, 0–100% relative to the other.


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


Edabit offers a learning experience similar to learning a new language, focusing on smaller and more frequent exercises that build proficiency over time. Like Codewars, Edabit provides many challenges that increase in...
In conclusion, while Leetcode remains a valuable resource for coders, the platforms listed above offer varied approaches to learning and improving coding skills. Whether you're drawn to the gamified learning...
This LeetCode alternative has excellent features for anyone looking to sharpen their coding skills. Codewars uses kata, which are small coding exercises that are community developed to help you master your language of...
Open-sourced by Netflix, Polynote is a notebook preferred for Scala. It supports the mixing of multiple languages in one notebook and allows easy data sharing. Since it shares the same file extension as Jupyter...
Recommendations tracked on public social media and blogs since March 2021.


Recently, I was working on a coding kata on codewars.com. Early on, I started thinking that a potential solution might utilize recursion, a concept that involves a function calling itself. However, I quickly realized that my grasp of... - Source: dev.to / almost 3 years ago
Get more involved. Look into internships and junior SWE positions to get a sample of what you'd be applying for once you graduate. Solve coding challenges, start working on a portfolio of your personal works. I recommend codewars.com for... Source: almost 3 years ago
I'd recommend to play around with some basic coding challenges on leetcode.com or codewars.com. If the course prepared you well you won't find this useful, but playing around with them will make sure that you are comfortable with basics... Source: about 3 years ago
If you're looking for more modern notebooks supporting Scala (and Spark): - https://almond.sh - https://polynote.org Toree is mostly dead but might also get a Scala 2.13 release now that Spark 4.0 is approaching. - Source: Hacker News / about 2 years ago
When comparing Codewars and Polynote, you can also consider the following products.

Learn the technical skills you need for the job you want. As leaders in online education and learning to code, we’ve taught over 45 million people using a tested curriculum and an interactive learning environment.
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Project Jupyter exists to develop open-source software, open-standards, and services for interactive computing across dozens of programming languages. Ready to get started? Try it in your browser Install the Notebook.
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Download and solve practice problems in over 30 different languages.
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Powerful interactive document that supports live computation, dynamic interfaces, full typeset input, image input, automatic code annotation, high-level programmatic interface, thousands of functions and options.
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Practice and level up your development skills and prepare for technical interviews.
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A web-based notebook that enables interactive data analytics.
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