
Codewars
Exercism
LeetCode
CodinGame
CodeCombat
HackerRank
Google's Python Class
CheckIO is a web site with a mission: To teach JavaScript and Python coding skills through a game-playing interface. It is designed to teach new skills or improve existing skills through completing challenges.

UMLGraph
Dia
yEd
draw.io
OmniGraffle
LucidChart
CollabNet
The JavaScript toolkit for graph visualization

Which is more popular?
Based on our record, CheckIO seems to be a lot more popular than KeyLines. While we know about 46 links to CheckIO, we've tracked only 1 mention of KeyLines.
Website, pricing, platforms and company facts side by side.
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| Website | checkio.org | cambridge-intelligence.com |
| Platforms | — | |
| Company | — | 2012 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of CheckIO yet.
KeyLines is a powerful graph visualization SDK for JavaScript developers. From law enforcement to fraud detection and cybersecurity, every day thousands of analysts rely on KeyLines-powered applications to turn their complex graph data into insight. As an SDK, KeyLines lets you build applications...
What each product offers, as listed by its team.


Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Intro Video. How to get maximum from CheckiO
Introducing KeyLines and ReGraph
How often each product is chosen within a category, 0–100% relative to the other.


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


CheckiO is a platform with coding games created for different levels of programmers, from beginners to advanced levels. Using fun and engaging methods, you can use coding games to solve challenges in TypeScript and...
CheckIO is available in English and Spanish. The platform was designed by a group of engineers and now has a number of customers all over the globe who may use it to improve their programming speed and abilities by...
Checkio is the most whimsical HackerRank alternative on this list. It’s also focused on two languages: Python and TypeScript. On this site you’ll be thrown into a gamer’s paradise that includes robot mollusks and...
We have no reviews of KeyLines yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


Have you heard of CheckIO (https://checkio.org/)? They have a gameified "Mario world" of coding challenges that are smaller and come with more explanation, tests to guide you through edge cases and provide hints. The challenges start... Source: almost 3 years ago
Cyber isn't gonna be a light switch, where you can flip it and be good. Don't be too hard on yourself. Start with some hands on stuff like https://tryhackme.com or checkio.org. You could look at certs like Security+ or CySA+ for some... Source: about 3 years ago
Much better to get your hands dirty than watching the videos. Try: https://checkio.org/. Source: over 3 years ago
I am looking for a powerful open-source graph visualization library to use in an upcoming project. This article provides a lot of options, however, most of the open source libraries that I found were no longer being maintained and / or... Source: about 5 years ago
When comparing CheckIO and KeyLines, you can also consider the following products.


UMLGraph is a professional automated drawing tool that allows the designers the declarative specification and drawing of UML class and sequence diagram.
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Download and solve practice problems in over 30 different languages.
Compare Exercism to CheckIO or KeyLines:

Dia is a GTK+ based diagram creation program for GNU/Linux, MacOS X, Unix, and Windows, and is released under the GPL license.
Compare Dia to CheckIO or KeyLines:

Practice and level up your development skills and prepare for technical interviews.
Compare LeetCode to CheckIO or KeyLines:

yEd is a free desktop application to quickly create, import, edit, and automatically arrange diagrams. It runs on Windows, Mac OS X, and Unix/Linux.
Compare yEd to CheckIO or KeyLines: