I feel using Mattermost in the office is exactly like using WhatsApp, it’s so easy to use. I use the Mac version of Mattermost, so whenever someone messages me, the app icon bounces and gives me a hint with a notification sound, which is very useful. And yes, it’s also a bit addictive. We colleagues sometimes set GIF profile pictures just to add some fun while chatting this is the feature I like the most. I never require customer support. Whole day we use Mattermost only Review collected by and hosted on G2.com.

Sometimes, finding a group or a person in the long list becomes difficult. I remember seeing some onboarding screens that explain Mattermost shortcuts, but I haven’t been able to find them again. After the latest update, the option to use a GIF as a profile picture also seems to be hidden, it’s quite hard to locate now. Files above 15 MB can’t be shared on Mattermost, and there’s also an issue with SVGs. I have to zip the file first, otherwise Mattermost doesn’t show it as a downloadable asset. Mattermost should find more ways to find new fun features that help office people feel more engaged. Review collected by and hosted on G2.com.

I appreciate Mattermost for its easy-to-use interface and the ability to create different channels for different teams within the company. Hosting our own server makes everything fast, and it is valuable to integrate a lot of useful systems and custom bots in the platform. Having our important data stored on the company server and the option for developers to set up and integrate various bots and tools easily are significant advantages. I find the bot commands especially useful for creating instant tickets and receiving automatic notifications for different alerts. The fact that custom bots can provide helpful information from external systems inside Mattermost is a great feature as well. Additionally, the overall setup process was pretty easy, aided by online video tutorials and documentation. Review collected by and hosted on G2.com.

I don't like that the search system is sometimes too cluttered and shows everything, making it hard to find what I'm looking for. Also, the UI design seems primitive compared to competitors like Slack. Review collected by and hosted on G2.com.

I use Mattermost as a secure team collaboration and messaging platform to support day-to-day communication and coordination. I appreciate how it helps keep conversations organized through channels, direct messages, and integrations, especially in environments where data privacy and self-hosting are important. The platform eliminates the need to rely on multiple tools or public chat apps by combining messaging, file sharing, and integrations in one place. I like how it centers on reliability, transparency, and control, which builds trust within the team. It supports disciplined communication through clear channels and integrations, which helps teams stay aligned without noise. Mattermost grows alongside technical and organizational needs, making it feel like a platform you invest in, not just a tool you use. Its strong focus on security, permissions, and self-hosting addresses compliance and data ownership concerns while keeping conversations organized and easy to follow across teams and projects. Review collected by and hosted on G2.com.

While Mattermost is strong in reliability and security, the interface feels very utilitarian, which can make everyday use feel less intuitive or engaging compared to more modern collaboration tools. Some useful features are buried in menus or settings, making them harder to discover without prior experience. Onboarding can also be challenging for new or non-technical users, as concepts like permissions, integrations, and self-hosted configurations often require extra explanation. Additionally, managing plugins and updates can feel manual and time-consuming, especially in larger deployments. Improving the visual polish, simplifying configuration flows, and providing clearer in-app guidance would make Mattermost easier to adopt while preserving its core strengths. Review collected by and hosted on G2.com.

I like the possibility of running it in self-hosted mode, which allows us to reduce costs while having complete control over our data. Additionally, the mobile app is very intuitive, aesthetically pleasing, and extremely functional. Review collected by and hosted on G2.com.

The server deployment cannot be performed on machines with ARM architecture. Review collected by and hosted on G2.com.

Direct messaging is easy, and creating a group chat with users is quick and straightforward. File sharing is also fast, which makes it convenient to send documents without delays. Review collected by and hosted on G2.com.

One thing I’ve always had issues with is their updates. Sometimes the updated installer fails for no clear reason, and then after a while it works fine again. Review collected by and hosted on G2.com.

The primary reason we chose Mattermost is the ability to self-host. working in a secure environment, we cannot have our operational chat logs stored on a public cloud servers; Mattermost gives us full data sovereignty. Beyond security, the webhook integrations are excellent. We have easily scripted our monitoring tools (like Zabbix and Grafana) to pipe alerts directly into specific "War Room" channels, which keeps our incident response strictly internal and organized. Review collected by and hosted on G2.com.

​The mobile app experience can be frustrating, specifically regarding push notifications on the self-hosted version. Getting reliable alerts requires either using their encrypted relay server or compiling your own app, which is a significant administrative hurdle for our team. Additionally, the search functionality isn't as intuitive or "fuzzy" as Slack's; if you don't recall the exact keyword or file name, retrieving older documentation from chat history can be difficult. Managing the server upgrades also adds to our operational overhead, as it requires manual maintenance windows rather than being a seamless SaaS update. Review collected by and hosted on G2.com.

An straight foreword tool for fast and protected messaging facility and sharing work too.

The application also has the ability to manage and track multiple business channels under this one shade. Centralizes the work of collaboration within teams and external members also from other organization.

Document sharing enhances in the app, as it allows to send files from your end to others seamlessly with your team members or even with the external teams also. All the operation involved in the app are completely protected and secured end to end.

Mattermost tries its best to meet all enterprise requirements, manage and message instantly.

Also it does support to have business calls, conferences, video meets instantly when needed that to with single person or in groups, everything is supported here.

Software even allows to integrate with various platform and web pages, to import documents/data and sometimes for connecting with the online business world wide. The enhances the ability of connecting to more people and increase leads. Review collected by and hosted on G2.com.

While switching to multiple devices with same account credentials, the server needs to be updated everytime. Review collected by and hosted on G2.com.

I use opensource version and selfhosted.

I looking for years for a solution who has chat and project management in one place for tracking status of project and fix problem fast. Review collected by and hosted on G2.com.

In selfhost you need to manage server problem but mattermost it's very robust and management it's very low. Review collected by and hosted on G2.com.

I like that Mattermost is open source. I also value that it's free to use if you set up your own server. Review collected by and hosted on G2.com.

The overall UX is less polished than many alternatives: eg Discord and Slack. The initial setup wasn't the easiest. Review collected by and hosted on G2.com.

Mattermost is a strong team communication platform. It offers Slack-like functionality with good channel organization, direct messaging, and integrations. Review collected by and hosted on G2.com.

The initial setup or maintenance can require technical effort.

It gets stuck a lot of times while working. Review collected by and hosted on G2.com.