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

MailChimp
Email on Acid
Sauce Labs
Browsershots
Constant Contact
browserling
CrossBrowserTesting
litmus tests and tracks your email campaigns, so you can always put your best design forward.

Which is more popular?
Based on our record, Codewars seems to be a lot more popular than Litmus. While we know about 160 links to Codewars, we've tracked only 2 mentions of Litmus.
Website, pricing, platforms and company facts side by side.
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| Website | codewars.com | litmus.com |
| Pricing | ||
| Company | — | Startup from the United States · 100 - 249 employees · 2005 |
| Listed in |
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.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using Codewars and Litmus. 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...
Display any email messsage as a web page, in desktop and mobile views. See the code used behind any email. Scoping is free as a stand-alone service and included with paid subscriptions to the Litmus email optimization...
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
Email clients are terrible at html, you could try using litmus.com (there's a free trial) that will show you what it looks like in a huge range of clients. Source: over 4 years ago
Hey guys I want to start a new project but I have no clue as to where to start, I want to create something like litmus.com where each user gets an email and then when you send an email to that email account you can see your email on... Source: over 4 years ago
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Treehouse is an award-winning online platform that teaches people how to code.
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