
Slack
Rocket.Chat
Discord
Element.io
Telegram
Zulip
Microsoft Teams
Mattermost is an open source alternative to Slack.
Which is more popular?
Based on our record, Code.org should be more popular than Mattermost. It has been mentioned 385 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | mattermost.com | code.org |
| Pricing | — | |
| Company | Startup from the United States | 2012 |
| Listed in |
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
Mattermost is recommended for organizations that prioritize data privacy and security, need extensive customization options, or are looking to integrate a collaboration tool into existing systems. It is also suitable for teams in regulated industries requiring on-premises solutions.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Mattermost - An Open Source, Self Hosted, Slack Chat Alternative
More videos
Programming For Kids: Scratch vs Code.org
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How often each product is chosen within a category, 0–100% relative to the other.


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


Mattermost is an open-source platform that enables safe collaboration in self-hosted chat programs featuring file sharing, search, and integrations; groups and businesses can use it as an internal chat.
Mattermost uses monolithic architecture, which is tightly coupled and complex to understand. It restricts the scalability of the collaboration tool, which is a limitation for growing businesses. In that case,...
Below is a curated list of the 12 best self-hosted messaging apps like MirrorFly, Mattermost, Zulio, Nextcloud, and Rocket.chat that offer unique collaboration features and lets you take full control of your data.
Code.org is an online marketplace that can empower students, specifically students, to get detailed knowledge regarding the principles of the computer sciences. This platform can let its users access the free coding...
Nevertheless, the platform has the stats to prove its dependability. More than 67 million people use Code.org, including over two million teachers. In addition, the platform records over 208 million projects so far.
Code.org is much easier to use than Thunkable.First of all names say everything.Second,it has more modes than just "drag-and-drop".
Recommendations tracked on public social media and blogs since March 2021.


The amazing thing is that there is almost always an open-source alternative that is 10x better in many ways, in the case of slack https://mattermost.com/ I'm looking forward for AI to make it very easy to deploy your own tools and walk... - Source: Hacker News / about 1 month ago
How does it compare to MatterMost [1]? [1] https://mattermost.com/. - Source: Hacker News / 4 months ago
Slack's value is real, especially for cross-company conversations with clients and vendors. But for internal communication in companies that care about data residency or audit requirements, Mattermost is a credible self-hosted... - Source: dev.to / 5 months ago
Code.org uses an extremely outdated version of javascript, It's so hard to access data in array, im basically forced to do this. Cant wait to ditch this shit. Source: almost 3 years ago
I'm not sure if your 4.5yo is old enough to try Scratch[1] but nothing is too young these days. My elder got into Scratch around that time. These days, my younger one is into https://code.org and she make things go around, do stuffs,... - Source: Hacker News / almost 3 years ago
So I am using code.org to make a platforming game, and if I am halfway off of a platform I slide off of it. Idk if this is a quirk with code.org or if I did something wrong. You can check the hitboxes by pressing debug sprites in the... Source: almost 3 years ago
When comparing Mattermost and Code.org, you can also consider the following products.


Scratch is the programming language & online community where young people create stories, games, & animations.
Compare Scratch to Mattermost or Code.org:

Rocket.Chat is a Web Chat Server, developed in JavaScript, using the Meteor fullstack framework.
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Learn the technical skills you need for the job you want. As leaders in online education and learning to code, we’ve taught over 45 million people using a tested curriculum and an interactive learning environment.
Compare Codecademy to Mattermost or Code.org:

Step up your game with a modern voice & text chat app. Crystal clear voice, multiple server and channel support, mobile apps, and more.
Compare Discord to Mattermost or Code.org:

Learn to code by helping nonprofits.
Compare Free Code Camp to Mattermost or Code.org: