
Scrimba
Data Protocol
GoIT LMS
Codelita
Codecademy
CodeCrafters
Divize
The most fun way to learn to code.

Killercoda
LeetCode
KodeKloud
Instruqt
interviewing.io
roadmap.sh
HeyDevJob
Troubleshoot and make a sad server happy! "Like LeetCode for Linux" Capture The Flag challenges. Train and prove your debugging skills. Practice for your next SRE/DevOps interview. Get a full remote Linux server with a problem and fix it.

Which is more popular?
Based on our record, Codédex should be more popular than SadServers.com. It has been mentioned 5 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | codedex.io | sadservers.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.


No analysis of Codédex yet.
Overall verdict
Why this product is good
Recommended for
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using Codédex and SadServers.com. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


I'm a new coder too. What helps me is finding a good place to learn the most basic principles and having 2-5 things I want to do. I started with codedex.io , learning Python and HTML and then took their courses and moved on looking for... Source: almost 4 years ago
I think you should focus on HTML, CSS, and JS, starting with HTML. I just started HTML on a website called codedex.io. Pretty cool so far but I feel like I'm getting into a brand new thing haha. Source: almost 4 years ago
I've been learning Python on a website called codedex.io for about 6 months. It's been great for me so far. I just started on Classes and Objects. Give them a try, you might like them. Source: almost 4 years ago
SadServers | Software Engineer | REMOTE (Canada) | Part-time or Contract | $55 - $75/hr | https://sadservers.com I'm the founder of SadServers, a SaaS that provides hands-on challenges for Linux & DevOps/SRE engineers and assessments... - Source: Hacker News / 11 days ago
What it is: SadServers gives you a broken Linux box in the browser and a problem statement. Disk full, service will not start, mystery process eating CPU. You fix it. - Source: dev.to / 3 months ago
Last year I found SadServer and this year it's been ixmiuz labs. - Source: dev.to / almost 2 years ago
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