Setup was smooth, server operation is transparent, user management trivial and everything just clicked into place when we were looking for a simple yet functional solution to team chat

Mattermost was absolutely trivial to set up and maintain, which was a huge plus back during the first dawn of Covid where we struggled to find a solution to team chat that allowed us to host on-premise, keeping all our data local - a must for many projects which have complicated data privacy regulations that are a nightmare to work around with cloud based products

One of the paid feature is unlimited search, and as a free user (10,000 line search limit, I think), it is often unclear whether you can't find what you're looking for because you hit the limit or because it's just not there.

Mattermost allows us to quickly keep connected to our colleagues across the world. It allows people to form groups and chat easily to many different teams, all within the same desktop app, web app, or mobile app.

This software is very easy to install and supports a simple Docker install, which makes it easy to keep up to date and secure. There are multiple examples on installing and running Mattermost in different cloud hosting environments, and the user community is also very helpful. Running the software locally means you can keep a much better eye on its security and usage. Its user management and directory integration is superior to Slack's. The desktop and mobile clients are fast and easy to install/configure/maintain.

There's not much that I dislike about Mattermost. Its open source nature may put some people off, but paid support and enterprise licensing solve that issue immediately.

Slack with AD integration at half the cost. But I still wish I could afford Slack.

Slack integrations just work on Mattermost. The theme choices are very nice. The ability to host my own on-premises server is very nice. Technical support staff is very knowledgeable and competent. I'm not made to feel like an idiot if there is some specialized knowledge that I don't have.

The Android client is extremely buggy and fairly slow still. Selecting a push notice to open Mattermost to view and respond in the thread does not always open the right thread and is always slow (even on LAN, with the latest gen of Android phone!)). The client MUST be snappy and it just.. isn't. The Windows client becomes slower and slower the longer you have it open, so it must be restarted every day or two. It's a little buggy; sometimes new messages make your view scroll up instead of down. But it works well enough most of the time.

We moved a large team of users in a very short time. Since we only need the communicator 99% of the time for communication between users, we reduced the cost of paying for another tool by 96%. With a similar look and functionality to other instant messengers, the transition was quick and painless. The team very quickly implemented and accepted the new tool.

Convenience of installation, practically free for most users, quick and easy implementation, very similar in appearance and functionality to top messengers, so it is very easy to move even a large group of users. Works fast and does not consume a lot of memory. Lots of add-ons and plug-ins being developed.

A few UX issues, but not significantly affecting the user experience. For example: No ability to search for users directly from the search bar, no preview of more than 1 image file, no internal media player, linking to YouTube instead of playing right away.

I really liked the platform. My team found it easy to learn how to use it. Now we are replacing email communications with Mattermost.

It's free, it's open source, it has very easy to follow documentation. It's safe and secure. It works smooth.

It could have sub-channels and addittional options to configure. Could give native option for audio sending.

I like that Mattermost not only offer instant messaging tools but also allocate web conferencing capabilities.

Searching keywords on chat doesn’t hide messages on private chats.

File sharing, team collaboration, BIM and live chat.

Ever since I started using Mattermost, it has never been daunting to send large files online, collaborate via unlimited communication channels and manage projects automatically.

I do not like how Mattermost can’t function in absence of mobile data or WiFi.

Mattermost boost productivity by unifying teams in my organization in one single workspace through corporate communication channels.

Video conferencing isn’t robust enough that’s why it demands to be integrated with external web conferencing systems like Zoom Meetings.

Real-time file sharing.Team collab.Business instant messaging.

Mattermost boost internal and external communication through creation of unlimited communication channels.

At the moment, Mattermost has no bugs and accomplishes all my daily needs.

Project management and business instant messaging.

Mattermost combines messaging and project management capabilities in one place.It has a robust backend integration feature, which boost it’s capabilities.Project coordination is another great thing about this tool.

I do not like that Mattermost demands to be integrated with external web conferencing apps to boost video conferencing.

We ended up looking for an alternative to Mattermost because of Slack's price-performance ratio and would switch again today.

Mattermost is constantly being developed and you can tell that it's going further. In addition, as a collaboration tool, it provides the most important information. No more and no less.

At the beginning (approx. 2018) it was still a bit unstable and some important features were still missing. This has gotten much better in 2022. Over the years, with many users, maintenance and upkeep should never be neglected. Otherwise it will be slow and have long loading times when changing channels etc. Plugins work, but not all are mature (e.g. Jitsi caused problems for us)

I use mattermos mohr than one year, but still can not used to it. main reason is that when I get the new notification, I don't get some signal, or beep. it doesn't appears on screen. mattermost is in my company main communication system. if I would asked, I would changed it with skype for business, or lync

mattermost is our companies inside network. we use it everyday to communicate. I like it because I have it also in my mobile. now when I work remotely, i am not always nearby computer and with mattermost I am always in touch.

I use mattermos mohr than one year, but still can not used to it. main reason is that when I get the new notification, I don't get some signal, or beep. it doesn't appears on screen.

A super and ready to use Slack alternative.

* The replacement of slack * Mattermost has almost the same features as Slack * You can host and run your own instance on your own server (For companies which hate clouds) :) * You have a good overview of logs and you can see what goes around * The statistics gives a good point when a dev team is productive * You can easily create unlimited integrations which some internal stuff

* The lack of integrations (Slack is here over the top) * The incoming hook limitation of maximum content length is the hell (Mattermost don't inform the customer about a message which was higher above the hard coded message size limit) * UX in Slack is a little bit better (Slack is massively using websockets and eventstreams to fetch the actual team messages) -> You see always whats going on * A 'Unread' channel (like in slack) would be a pleasure ;) * A step by step guide for creating an integration would not bad for not advanced users

Very good. Prefer it to slack as it can be self hosted

Self Hosted, easy to use and implement on our own servers.

Needs Manual intervention to clean up old files

Mattermost is a great software to use with the virtual employee situation which allows the sharing of ideas, answers to customer facing issues, and the ability to communicate privately with leadership and/ or teammates. The chat is instantaneous, which allows for faster responses than emails.

Interactive media that allows instant communication with teammates and leadership, whether it was a question or just sharing of daily life. The ability to host channels that was based on teams, programs, and specified topics. All individuals were able to have private groups to chat with friends, co workers, or teams.

The scroll in chats often moved so very quickly that questions and responses were missed. Inability to customize responses such as color, fonts, etc.

tool is great, and from this users perspective is a fine alternative to slack.

It's very easy to use, and as far as I can tell works alot like slack. I'm not sure if it has as many plug-in options but that's not something I'd use anyway. Great for team collaboration and general communication.

I get LONG LISTS of rooms and chats and there is no easy way to search for people aside fom doing a control-f. I can search within chats, but I think it needs to be easier to search FOR chats

One of the most critical aspects of Mattermost: it's self-hosted. Yes, that means additional work for hosting, but it also ensures our internal communication stays internal. We use Mattermost for almost all of our discussion​, and it has dramatically improved our workday.

Mobile clients exist, but there are not necessarily​ great. I often use the website instead of the mobile client, because it is quicker and the status of my colleagues is actually shown correctly.

Complete control on our data. We also finally centralized all our communication and standardized it. No more private message, group private message and all that mess. Lastly, we have couple of our product that are using incoming webhook to push important notifications.

easy to use S3 backend Good support of different databases Quite easy to configure for the different needs of a company I love the threaded reply, make it so much easier to follow multiple threads in the same channel. Mobile notifications are quite useful Mobile native app was quite welcomed, the previous one wasn't up to standard

some glitch in the mobile applications Weird marketing decisions on which feature goes in which package Can't see how many private channels are present (as the administrator of the server)

Overall Mattermost is very convenient for me. I have access from my android phone as well. so i can chat with colegues from anywhere. This is important for me.

Mattermost is easy to use. It helps me rapidly contact colegues, chat with them and so fix problems. i can easily share files. i use it daily. it simplifies my work a lot.

To be honest, i don't like user interface. it seems boring for me.

There are not that many good options for team messaging apps. Hipchat or Microsoft Teams do not even come close in terms of either functionality or scalability from a slack. Hipchat,Yammer, Skype were from another generation. However slack is expensive, and they limit your search history, if you're using their free version. Mattermost has the exact same functionalities but its code base is totally open so it can be integrated with anything you can think of (even those legacy applications that Slack won't bother with).

Might take you an hour to deploy. and if you're not familiar with deploying applications you might have to read the instructions... But other than that. It's a 10/10.

Finally we managed to bring people together to discuss things in an easy way on the global level. E-mail threads that hurt are ghosts of the past now.

Open Source community driven. Very easy to install and maintain. Very stable. Easy to integrate.

Some fancy features might take forever to be implemented. Lacks some nice to have admin features for large user groups.

One place for team communications that Slack/Hipchat users find familiar and everybody else learns easily. Integration with other software in our mostly open source workflow.

Great integration with as many systems as we want including with SSO and being able to roll our own tweaks when necessary.

Audio and video integrations are still in beta and a bit rough. My teams pretty much prefer out of band calls for that which detracts from team interactions. Also notifications are a little dicey.

The ability of Mattermost to detect that you paste an image URL and display the image without getting out of Mattermost, and the fetching of Oembed/Opengraph/whatever data of URLs, providing summary of pages. And the extendability with hooks.

Well, sometimes, I can't find the message I'm looking for with the research feature, but it surely is caused by bad search terms. Putting flags on important messages helps not loosing them.

So intuitive interface and so less clutter. The teams love mattermost for many things, integrations, easy to use interface, stability of the software.

1. The ability for anyone to delete a channel. 2. Lack of SAML support for team edition