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

ChurnBuster
ChurnKey
Browse AI
MarsX
Baremetrics Dunning & Retention
Safurai
Captain
Dunning emails, failed payments, churn prevention, event notifications, custom HTML receipts and more for Stripe subscriptions, with iPhone app and push notifications

Which is more popular?
Based on our record, Codewars seems to be a lot more popular than Stunning. While we know about 160 links to Codewars, we've tracked only 3 mentions of Stunning.
Website, pricing, platforms and company facts side by side.
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| Website | codewars.com | stunning.co |
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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 Stunning yet.
Walkthroughs and reviews on video.
Codewars Review & Tips
More videos
Going In Style - "Instant Classic/Stunning Review" TV Spot
More videos
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using Codewars and Stunning. 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...
Every tool here can recover failed payments; the question is fit. The incumbents — Churnkey, Paddle Retain, Churn Buster, Stunning, Baremetrics — are proven, and each has a scenario where it's the right call, which...
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
When should a B2B SaaS reach for FlyCode (an app on Stripe Marketplace) vs Stripe Dunning (I'm actually unsure if it's their own offering or not)? [1]: https://stunning.co/. - Source: Hacker News / almost 2 years ago
I have used stunning.costunning . And if you are using stripe there is already existing a basic dunning followup. Source: over 5 years ago
Their blog has no sign-in button. Their main page (https://stunning.co/) does. - Source: Hacker News / over 5 years ago
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Download and solve practice problems in over 30 different languages.
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