
Slack
Rocket.Chat
Discord
Telegram
Element.io
Microsoft Teams
Zulip
Mattermost is an open source alternative to Slack.

Codio
Enhance student learning by streamlining your coding assignment workflow.

Which is more popular?
Based on our record, Mattermost seems to be more popular. It has been mentioned 76 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | mattermost.com | assignment-os.com |
| Pricing | ||
| Platforms | — | |
| Company | Startup from the United States | 2022 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of Mattermost yet.
AssignmentOS is the first holistic platform for Higher Education to automate the sending, retrieving, and grading of students’ coding assignments while allowing students to improve their skills with real-world tools & workflows. Coding Bootcamps & Universities from all over the world rely...
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
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
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How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Mattermost and AssignmentOS.
AssignmentOS's answer:
AssignmentOS provides a platform which automates the sending, retrieving, and grading of students’ assignments via automated grading and GitHub/GitLab-based workflow.
AssignmentOS's answer:
AssignmentOS provides the following to customers: - Open up your courses to more students by reducing the manual workload on lectures and TAs. - Enables TAs to easily give detailed, actionable feedback on submissions. - Enhance student learning experience with real-world tools & workflow.
AssignmentOS's answer:
AssignmentOS is helpful for all types of coding education providers: - Universities offering Computer Science courses - Coding Bootcamps - IT Training & Upskilling Providers - MOOC (Massive Open Online Courses)
Share your experience with using Mattermost and AssignmentOS. 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.
We have no reviews of AssignmentOS yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


Mattermost | Remote (US and Canada) | FT | Multiple roles Mattermost (https://mattermost.com) is an open-core collaboration and workflow automation platform for air-gapped, on-prem and private clouds. Our customers are in defense,... - Source: Hacker News / 18 days ago
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 / 2 months ago
How does it compare to MatterMost [1]? [1] https://mattermost.com/. - Source: Hacker News / 5 months ago
Tracking AssignmentOS since Jun 2023.
When comparing Mattermost and AssignmentOS, you can also consider the following products.

A messaging app for teams who see through the Earth!
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Rocket.Chat is a Web Chat Server, developed in JavaScript, using the Meteor fullstack framework.
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Step up your game with a modern voice & text chat app. Crystal clear voice, multiple server and channel support, mobile apps, and more.
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Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
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Secure messaging app with strong end-to-end encryption, advanced group chat privacy settings, secure video calls for teams, encrypted communication using Matrix open network. Riot.im is now Element.
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