
Codewars
Exercism
LeetCode
CodinGame
CodeCombat
HackerRank
Codecademy
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.

Expirity
Domain-Monitor.io
Klaxel
Oh Dear!
DomainRisk.io
Domain Watchdog
Domainyze
ZoneWatcher is a audit trail for your DNS records. Automatically backup records and get alerted when changes occur. Find potential issues before your customers do!

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 | zonewatcher.com |
| Pricing | — | |
| Platforms | — | |
| Company | — | Startup from the United States · 1 - 9 employees · 2016 |
| Listed in |
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
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How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing CheckIO and ZoneWatcher.
ZoneWatcher's answer:
ZoneWatcher is the only DNS monitoring solution that integrates directly with dozens of DNS service providers such as AWS, CloudFlare and Azure. This allows us to fetch your DNS records in full and quickly detect changes in minutes, not in days.
ZoneWatcher's answer:
ZoneWatcher focuses on providing tools to system administrators, IT teams, agencies, and consultancies which manage many domains.
ZoneWatcher's answer:
It began in 2016 out of some frustration I was having with consulting clients who would modify their DNS records incorrectly, breaking their email and/or website until I was able to get them back online. It was frustrating digging through emails or technical documents to find the original values before they had made their changes.
I wanted a tool that could automatically backup those records to make reverting easy while at the same time notifying me of any changes so issues could be proactively fixed before their business was impacted.
Share your experience with using CheckIO and ZoneWatcher. 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...
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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 ZoneWatcher since Sep 2024.
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Download and solve practice problems in over 30 different languages.
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Looking for the complete domain and website uptime monitoring solution? Domain Monitor keeps an eye on your website, cron, SSL and domain name 24/7 and will alert you through Email, SMS and web when something stops working.
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Practice and level up your development skills and prepare for technical interviews.
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Domain-health monitoring for MSPs. Watch every client domain across every registrar — expiry, TLS, DNS, email-auth (SPF/DKIM/DMARC), web security — graded A–F, white-labeled per client, alerts to email, Slack/Teams or your PSA. From $99/mo.
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