
Codewars
LeetCode
Exercism
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.

Canva
The Simple Postcard
Local Mail by Mailjoy
Lob
MailtoUI.js
Postalytics
Felt for iPhone
Delightfully easy direct mail marketing. A DIY direct mail tool created for marketing and growth teams. Design, mail & track personalized direct mail postcards and letters. Digital marketers use Mailjoy to send data-driven mail campaigns.

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.
|
|
|
|
|---|---|---|
| Website | checkio.org | mailjoy.com |
| Pricing | — | |
| Platforms | — | |
| Company | — | 2017 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of CheckIO yet.
Why Mailjoy? Compared to digital channels, mail is an unsaturated channel that until recently has been generally inaccessible and lacked personalization. Mailjoy is the tool to reach customers or prospects with mail that's relevant and timely to them. Start by customizing any of our free postcard...
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
No analysis of Mailjoy yet.
Walkthroughs and reviews on video.
Intro Video. How to get maximum from CheckiO
Your customers' inbox is full. Try mail!
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing CheckIO and Mailjoy.
Mailjoy's answer:
Compared to digital channels, mail is an unsaturated channel that until recently has been generally inaccessible and lacked personalization. Mailjoy is the tool to reach customers or prospects with mail that’s relevant and timely to them. Start by customizing any of our free postcard and letter templates.
Mailjoy's answer:
We value our small, scrappy customers just as highly as our larger clients, therefore we are on a mission to bring the best tools to the masses, streamlined in a way that allows anyone to dive in and get started in minutes.
Mailjoy's answer:
When we launched Mailjoy on Product Hunt we received over 700 upvotes and ended up #2 for the day. We were ecstatic, but the real story here is that we actually launched nearly a month earlier without the fanfare of a traditional tech launch.
We had quietly launched Mailjoy a month earlier to a portion of our network through email outreach, Facebook, and Twitter. We had two asks: One was to share with people who might be a good fit for this. The other was to share the website more broadly on social. We ended getting over a dozen shares across different channels which drove 100’s of visitors to the site.
Our first customer came from a share by a friend. By launching early, we found someone who cared enough to take a chance on us right away.
As much as we learned what converted visitors to become customers, we learned what was lacking and caused people not to convert. This helped us reprioritize our roadmap before the Product Hunt launch.
I like to consider a marketing site the showroom that entices people to take a test drive. If the showroom’s offering isn’t appealing, do people really want to go for a test drive? Probably not. We quickly learned what copy we were missing, as well as how potential customers viewed the product based on how we marketed it.
Our code wasn’t perfect and we had bugs. That’s OK. Visitors and users gladly pointed what wasn’t working. P.S — We quickly fixed things.
With a successful launch on Product Hunt behind us, we have more customers, received more feedback, and once again, are reprioritizing our short-term roadmap for things that drive the most growth and solve usability challenges. I fundamentally believe that shipping as soon as possible is the key to maximizing your learnings, and, ultimately, growing faster.
Remember, done is better than perfect.
Mailjoy's answer:
Mailjoy has a ton of features to help you create mailing lists from your contacts, design beautiful direct mail postcards and letter mailers, track the results, and integrate with other tools you already use. Sending a campaign takes only minutes. Use Mailjoy for a single campaign or make it a part of your marketing toolkit.
Additionally, Mailjoy provides recipient-level delivery tracking, conversion tracking, customer attribution, and the ability to get notified the moment a conversion happens - using unique per-mailer URLs and QR codes.
We've made sending direct mail as trackable and smart as email. Never send another direct mail campaign without the ability to track your return on investment again.
Share your experience with using CheckIO and Mailjoy. 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...
Verdict: If you are on the lookout for user-friendly postcards software, Mailjoy may be an ideal fit. It comes with a broad collection of fonts, images, and shapes that you can use in custom designs. With this program...
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 Mailjoy since Mar 2021.
When comparing CheckIO and Mailjoy, you can also consider the following products.


Canva is a graphic-design platform with a drag-and-drop interface to create print or visual content while providing templates, images, and fonts. Canva makes graphic design more straightforward and accessible regardless of skill level.
Compare Canva to CheckIO or Mailjoy:

Practice and level up your development skills and prepare for technical interviews.
Compare LeetCode to CheckIO or Mailjoy:
Text a photo to mail it as a postcard
Compare The Simple Postcard to CheckIO or Mailjoy:

Download and solve practice problems in over 30 different languages.
Compare Exercism to CheckIO or Mailjoy:

The easiest way to mail potential customers in an area
Compare Local Mail by Mailjoy to CheckIO or Mailjoy: