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Mattermost is an open source alternative to Slack.

Mattermost Reviews and details

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Mattermost - An Open Source, Self Hosted, Slack Chat Alternative

Demo of Mattermost Basics | Features end users love

Getting Started with Mattermost

Social recommendations and mentions

We have tracked the following product recommendations or mentions on various public social media platforms and blogs. They can help you see what people think about Mattermost and what they use it for.
  • Slack AI Training with Customer Data
    This feel like a corporate greed play, on what should be a relatively simple chat application. Slack has quickly become just another enterprise solution in search of shareholder value at expensive of data privacy. Regulation of these companies should be more apparent to people, but sadly, is not. I would recommend as an alternative. - Source: Hacker News / about 1 month ago
  • Slack AI Training with Customer Data
    Personally, I rather liked self-hosted versions of these: Mattermost: Rocket.Chat: Nextcloud Talk: Out of those, Mattermost was the easiest to setup (just need PostgreSQL and a web server, in addition to the main container), however not being able to easily permanently delete instead of just archiving workspaces was awkward. Nextcloud... - Source: Hacker News / about 1 month ago
  • Discord to Start Showing Ads for Gamers to Boost Revenue
    > Tell me another platform that is free, has realtime chat, voice and video, has stable service, allows sharing images and other media, with good ownership management... And is open source. Mattermost: Rocket.Chat: Nextcloud Talk: Self hosting and some assembly required. I've run all of them on cheap VPSes to explore a Slack/Discord... - Source: Hacker News / 3 months ago
  • Ask HN: Who is hiring? (March 2024)
    Mattermost, Inc. | Senior React Native Engineer | REMOTE (US Only) | Full-Time At Mattermost we build an open core, chat and collaboration platform focused on making users with mission critical work more productive while also allowing our customers to self-deploy and have full control over their own data. We’re looking for a Senior React Native Engineer who has the depth to significantly move the performance... - Source: Hacker News / 4 months ago
  • A list of SaaS, PaaS and IaaS offerings that have free tiers of interest to devops and infradev
    Mattermost — Secure collaboration for technical teams. Free plan with unlimited channels, playbooks, boards, users, 10GB storage, and more. - Source: / 5 months ago
  • List of your reverse proxied services
    Mattermost for Chat, and also for Notifications sent by Uptime-Kuma. Source: 7 months ago
  • Alternatives List
    Mattermost is an good alternative to companies, workers and teams. Source: 12 months ago
  • Trello Alternative
    Might be overkill but Source: about 1 year ago
  • Does anyone use Signal for work/business?
    Setting up a Matrix server is quite demanding. Maybe something like mattermost is a better fit for a small team? Source: about 1 year ago
  • Trouble with reminders
    I set up Mattermost on a Linux server I had standing around. Problem solved with the (still a little buggy but usable) remind plugin. And as an extra bonus now our team talk is completely private with full history. Source: about 1 year ago
  • Would you help me move to a more open-sourced and decentralised digital workspace?
    Another good alternative as a team chat is Source: over 1 year ago
  • Teams vs Slack
    Mattermost has the best security and compliance across the board. Check them out. And MS mines your chat data BTW, just like Google does your emails/chat. Source: over 1 year ago
  • Netdata release 1.38.0
    The agents can now send notifications to Mattermost, using the Slack integration! Mattermost has a Slack-compatible API that only required a couple of additional parameters. Kudos to @je2555! Source: over 1 year ago
  • A question for technologists: can we start an open-source cheat-detection engine that becomes the gold standard of cheat detection engines?
    Our military uses this program to communicate classified information and it's open-source. "Everyone can see the code therefore it is easier to circumvent" is false logic. Source: over 1 year ago
  • Any Slack/Discord alternatives for arm64 architecture ?
    More leaning to the Slack side, but Mattermost could be an option for you. Source: over 1 year ago
  • Discord Replacement
    Mattermost can be self-hosted and actually comes with GitLab Omnibus deployments iirc (albeit disabled by default). Source: over 1 year ago
  • What would you love to see as self hosted service?
    Depends on how you're using Discord, but there's Mumble, Mattermost, and Element/Matrix. Source: over 1 year ago
  • Odyssey of finding a self-hosted personal Kanban/ToDo-Webapp with Mobile-App
    I too have been frustrated by the lack of kanban projects with mobile. I personally prefer a native mobile app vs a webpage. What I ended up settling on was Mattermost . I think it should tick most of your boxes. Source: over 1 year ago
  • Ask HN: Self hosted user friendly chat app for family?
    I maintain a Synapse homeserver for our open source project and it seems to work fine, I don't know how different it is from Conduit. Other open source and self-hosted chat apps I've heard of but haven't used are Mattermost[1] and[2]. [1] [2] - Source: Hacker News / over 1 year ago
  • Ask HN: Who is hiring? (December 2022)
    - Data Analyst, Data Engineering team - Senior Program Manager, Data Engineering team - Product Manager, Playbooks Team - Senior Product Security Engineer Please submit your application here: or send your resume to - Source: Hacker News / over 1 year ago
  • web gui alternative for Discord srv
    Element, Mumble, and Mattermost could all be considered alternatives to Discord. I haven't used any of them together with Minecraft, but I found these plugins. * Minetrix is a "Spigot/PaperMC plug-in for connecting your Minecraft server with a Matrix room" * MumbleLink's "purpose is to be able to use Minecraft in conjunction with Mumble's positional audio feature". Source: over 1 year ago

External sources with reviews and comparisons of Mattermost

10 Best Telegram Alternatives in 2024
Mattermost is the most widely used Social platforms for any companies specially IT sectors, and it serves as one of the top Telegram alternatives. Provides easy-to-setup interface with fast performance. This app is designed for file sharing, searching options and also to allow user internal chat facility. Mattermost is the alternative for telegram and microsoft teams apps.
Top 5 Voice Messaging Apps To Keep Teams Connected
Some business conversations are private and cannot be discussed on third-party servers. If you are looking for a secure app to use for your conversations, consider using Mattermost. The app is open-source where you will need to have it downloaded and installed on the servers of your company. This is one of the video messaging apps that are self-hosted. With this app, you can divide conversations into channels and...
Why we switched to Mattermost
Just dialing that down a notch – both our Mattermost clients (usually browsers) and Mattermost servers are now invisible to the Internet and invisible to any network. If a user session is properly identified (dive deeper here if strong identification (no, IP addresses don’t count!) is important to you), authenticated and authorized then it can open a Zero trust application connection. Else, no soup for you.Â...
14 of the Best Slack Alternatives for 2022
Mattermost offers freemium pricing plans for small teams that feature unlimited message history and integrations. Additionally, Mattermost supports more than a dozen languages, making a great fit for global teams.
18 Best Discord Alternatives 2020 | Expert Reviews
However, to set up Mattermost, you must have technical knowledge. Since it is running on your servers, you will have to maintain the instance. Also, you will need to upgrade Mattermost when new releases are out.
Top 10 Team Chat Software for a Self-Hosted environment specifically designed for Large Enterprises
Mattermost introduces itself as a ‘High Trust Messaging for the Enterprise’, and it is true. An exceptional self-hosted open source messaging platform that extends secure communication across the industries of all forms and sizes. It can be deployed on a private cloud within the premises of local servers. The organizations which are high on privacy-conscious believe Mattermost as their flexible partner for all...
10 Tried and True Telegram Alternatives
While you’ll need to deploy it on your server, Mattermost also provides a host of customization options across its web, desktop, and mobile apps – such as the ability to add encryption on both communication and server-level; custom branding and login page design; and the ability to customize the languages available in the UI.
Top 11+ Slack Competitors to look out for in 2020
Mattermost, as premium business chat software, is dedicated to providing business with premium collaboration solutions. The hybrid, slack competitors open source, the private cloud allows the paid users to avail a configurable, highly encrypted, and scalable messaging solutions across mobile, web, and PC.
Top 20 Skype for Business alternatives for 2019 and beyond
Mattermost is an open-source alternative to Skype for Business, so companies can host within their own protected environment. There’s a free trial to get you started, and enterprise-grade encryption.
Zulip Comparisons
* On Mattermost's licensing: Mattermost Team is open source, but most enterprise-grade features are in Mattermost Enterprise, which is not.

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This is an informative page about Mattermost. You can review and discuss the product here. The primary details have not been verified within the last quarter, and they might be outdated. If you think we are missing something, please use the means on this page to comment or suggest changes. All reviews and comments are highly encouranged and appreciated as they help everyone in the community to make an informed choice. Please always be kind and objective when evaluating a product and sharing your opinion.