
BT
ArchiOffice
FNTS
Datalink
ANS
Front-End Checklist
Hubbos
The world’s largest collection of open access research papers

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

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.
|
|
|
|
|---|---|---|
| Website | core.ac.uk | mattermost.com |
| Pricing | — | |
| Company | — | Startup from the United States |
| 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
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.
Walkthroughs and reviews on video.
The Core Movie Review
More videos
Mattermost - An Open Source, Self Hosted, Slack Chat Alternative
More videos
How often each product is chosen within a category, 0–100% relative to the other.


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


We have no reviews of CORE yet. Be the first one to post
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.
Recommendations tracked on public social media and blogs since March 2021.


Tracking CORE since Mar 2024.
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 / 6 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 / about 2 months ago
How does it compare to MatterMost [1]? [1] https://mattermost.com/. - Source: Hacker News / 5 months ago
When comparing CORE and Mattermost, you can also consider the following products.

Be there for the moments that matter with superfast fibre broadband, TV packages, BT Sport & mobile deals from BT. Discover more about what our products can offer you, manage your account & get help when you need it online today.
Compare BT to CORE or Mattermost:

ArchiOffice Office and Project Management Software is an ideal solution for Architects, Engineers and other Service Professionals. ArchiOffice will eliminate your billing pains. It operates on both PCs and Macs.
Compare ArchiOffice to CORE or Mattermost:

Rocket.Chat is a Web Chat Server, developed in JavaScript, using the Meteor fullstack framework.
Compare Rocket.Chat to CORE or Mattermost:

First National Technology Solutions provides customized IT solutions and managed IT services to meet your business needs.
Compare FNTS to CORE or Mattermost:

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 CORE or Mattermost: