
Slack
Mattermost
Discord
Element.io
Zulip
Telegram
Microsoft Teams
Rocket.Chat is a Web Chat Server, developed in JavaScript, using the Meteor fullstack framework.

LeetCode
The bug you can't spot today ships tomorrow. Train before the incident: one realistic AI pull request a day, graded against a canonical review. Free, no signup.

Which is more popular?
Based on our record, Rocket.Chat seems to be more popular. It has been mentioned 68 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | rocket.chat | diffdojo.com |
| Pricing | — | |
| Company | Startup from Brazil · 50 - 99 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
Rocket.Chat is well-suited for businesses and organizations that require a secure and customizable communication platform. It's particularly recommended for IT teams, tech-savvy businesses, or community groups comfortable with managing an open-source solution. It's also a great choice for organizations that need to meet strict data privacy and compliance requirements.
No analysis of DiffDojo yet.
Walkthroughs and reviews on video.
What does Rocket.Chat look like?
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How often each product is chosen within a category, 0–100% relative to the other.


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


While Mattermost supports internal communication, Rocket.Chat has extended abilities that promote internal as well as external communication with customers, suppliers, vendors, and others. Also, the platform attaches...
Let us know if you want to have a quick chat with our team over here at Rocket.Chat to go through the most important advantages Rocket.Chat holds over Webex.
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Recommendations tracked on public social media and blogs since March 2021.


Indie hackers also leverage collaboration tools like Nextcloud for file sharing and team projects, and Mattermost or Rocket.Chat as self-hosted alternatives to Slack. These tools empower remote teams and foster efficient communication... - Source: dev.to / over 1 year ago
Communication tools such as Mattermost and Rocket.Chat support team collaboration. - Source: dev.to / over 1 year ago
Rocket.Chat is an open source communication platform that allows teams to collaborate in real-time. It supports text, voice, and video communication and integrates with various other tools and services. Learn more about Rocket.Chat on... - Source: dev.to / over 2 years ago
Tracking DiffDojo since Sep 2026.
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Chat for distributed teams. Zulip combines the immediacy of real-time chat with an email threading model. With Zulip, you can catch up on important conversations while ignoring irrelevant ones.
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