SSS Yet To Be Done.
Mattermost
https://en.wikipedia.org/wiki/Mattermost
Mattermost is a open-source, self-hostable chat service. It is designed as an internal chat for organisations and companies, and mostly markets itself as an alternative to Slack.[3]
The code was originally proprietary, as Mattermost was used as an internal chat tool inside SpinPunch, a game developer studio, but was later open-sourced.[3] The 1.0 was released on 2.10.2015.[4]
The project is maintained and developed by Mattermost Inc.[5] The company generates funds by selling support services and additional features, that aren't in the open-source edition.
There are Clients on Windows, MacOS, and Linux and for iOS and Android.
In the media Mattermost is mostly regarded as an alternative to the more popular Slack.[6][7][8][9] It also got integrated into GitLab as "GitLab Mattermost",[10] although in the mean time GitLab aquired Gitter,[11] another popular chat tool.
https://www.mattermost.org/
Mattermost is an open source, self-hosted Slack-alternative
As an alternative to proprietary SaaS messaging, Mattermost brings all your team communication into one place, making it searchable and accessible anywhere. It’s written in Golang and React and runs as a production-ready Linux binary under an MIT license with either MySQL or Postgres.

Mattermost is:
- Slack-compatible, not Slack-limited – Mattermost features rival Slack features, and support a superset of Slack’s incoming and outgoing webhook integrations, including compatibility with existing Slack integrations. From your existing Slack teams, you can import users, public channel history and even theme setting colors into Mattermost.
- Mobile and desktop apps, in addition to web – Use Mattermost from your iOS or Android phones and tablets or with installed apps on Windows, Linux and Mac.
- Easy to deploy, manage, and upgrade – Mattermost runs as Linux binary, Docker image, and many other forms. Try Mattermost with a one-line Docker install, and many install guides are available. Improvements ship every two months.
- Supported by a vibrant community – Use Mattermost with dozens of community integrations and applications, including Jira, IRC, XMPP, Hubot, Giphy, Jenkins, GitLab, Trac, Redmine, SVN, RSS/Atom and many others. Build and share your own apps using Mattermost APIs and drivers.
Also see: 10 reasons why Mattermost is better than Slack
BONUS: Sign-up for the Mattermost Insiders mailing list and we’ll send you an upcoming article on How to integrate over 400 applications to Mattermost–including Jira, Github and Twitter–using Zapier integration.
https://mattermost.com
Collaborate securely and privately

A secure messaging workplace deployable to cloud or on–premises infrastructure under IT control that accelerates productivity and innovation at scale.

Mattermost is a Gartner Cool Vendor
Mattermost is cool because it gives buyers visibility into the code and enables deeper customization to match exact business models and needs.
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Secure, self-hosted messaging workplace. Available on every device.
See all features

Achieve peak productivity
Mattermost's messaging workplace empowers teams to chat less while staying informed—and ultimately accomplish more.

Positively influence innovation
Mattermost creates a workplace environment that cultivates collaboration and engagement, accelerating the pace of innovation.

Turn knowledge into capital
Mattermost securely stores and makes searchable all workplace communication. Tap into company knowledge as you would a Google search.
Engineered for Demanding Requirements
Deploy Secure Scale Customize Manage

Cloud
Compatible with hybrid architectures and deployable to both public and private clouds.

On-premises
Secure, on-premises installation in your data center with layered security options (e.g, SSL, VPN and DMZ).

Pre-built images
Skip the install and configuration process with pre-built open source images supporting AWS, Azure and Google Cloud.

On all devices
A single place for messaging, tools and files. Accessible from the web or your favorite device—iOS, Android, Windows, Linux and Mac.

















Explore Our Solutions
Industry
Modernize workflows and accelerate innovation while ensuring regulatory compliance.
Industry
Rapidly communicate and adapt to new challenges and maintain privacy and security.
Industry
Achieve control over communications and increase productivity without compromising on security.
Use Case
Bring tools and group messaging together to get better work done faster.
Use Case
Maximize control for dealing with emerging threats and complying with new laws such as GDPR.
Use Case
Pull all conversations into one location to easily implement a corporate compliance program.
Use Case
Bring messaging, tools and files together in a single place to do better work faster.
Use Case
Migrate from Hipchat and integrate Mattermost with Atlassian products.
Privacy-Conscious Organizations Trust Mattermost
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Why Open Source
Hundreds of contributors around the world help develop Mattermost (we're popular on GitHub). Never get locked in, retain complete control of your infrastructure and avoid surprises altogether.

Explore the docs
From deployment on your hybrid cloud to end-user and admin guides, learn how to customize Mattermost for your organization.
Over 100 in-depth guides available
See all documentation

Alternative to Slack
Mattermost is an open source Slack alternative. It's written in Golang and React and runs as a single Linux binary with MySQL or PostgreSQL. Use the features you like (file sharing, real-time group chat and webhooks—to name a few) and access the source code.
See Mattermost vs. Slack

Migrate from Hipchat
Organizations are migrating from Hipchat, IRC and Rocket.Chat to Mattermost. After Slack acquired Hipchat, customers searched for open source alternatives. And Mattermost became the leading choice for on-premises Atlassian customers.
Migrate from Hipchat to Mattermost
Do better work faster with Mattermost
or contact a Solutions Engineer
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