
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.

Nudgify
Fomo
NotificationX
The Trustmaker
ProofGain
Proof
Optinjar
ProveSource is a social proof marketing platform that streams recent customer behaviors on your website to build trust and increase conversions.
Which is more popular?
Based on our record, CheckIO seems to be more popular. It has been mentioned 46 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | checkio.org | provesrc.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.


Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
Businesses seeking to improve website conversion rates, e-commerce platforms wanting to increase sales, and marketers looking to build trust and credibility through social proof notifications.
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 CheckIO and ProveSource. 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...
ProveSource simplifies the process of leveraging social proof to boost conversions. The onboarding is straightforward—just sign up, add one line of code to your website, and configure customizable notifications. From...
FOMO, the Fear Of Missing Out, has been a powerful marketing tool for ages. You can use FOMO Social Proof to create urgency by showing pop-up notifications of recent purchases. However, it's pricey and complex....
ProveSource is also easy to set up and powerful social proof software that helps you customize notification icons, links, texts, and more. It automatically collects data like clicks, hovers, impressions, engagement...
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
Tracking ProveSource since Mar 2021.
When comparing CheckIO and ProveSource, you can also consider the following products.


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Download and solve practice problems in over 30 different languages.
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