Because I find it to be already better than Slack. Took a few commands to set it up at work on our own server. Convenient, fast, and has the good bits from the Slack UI.
Mattermost is a fantastic open source alternative to Slack, nicely integrated with Gitlab.
We used Slack on a few projects, but the thought of using a third-party to host corporate development discussion was an absolute no-no in the long run.
It's staggering how fast people are to pay for something when there's a cheaper (or free) alternative out there, these days.
> Mattermost is a fantastic open source alternative to Slack, nicely integrated with Gitlab.
> We used Slack on a few projects, but the thought of using a third-party to host corporate development discussion was an absolute no-no in the long run.
> It's staggering how fast people are to pay for something when there's a cheaper (or free) alternative out there, these days.
How can you characterize the price as free? Do engineers at your place of work have so much free time that they can spend it setting this stuff up? What happens when chat goes down? Are you going to invest in becoming experts in running the app? All these are considerations that factor into the total cost of ownership, which oftentimes is far higher than the posted sticker price.
You're right that it does take some effort to self manage. We try to make it as easy as we can with a single Linux binary and lots of documentation.
One of the most common scenarios for Mattermost is deploying into a private network, that's invisible to SaaS services.
The software that runs manufacturing plants should never touch the internet. Neither should the backends of financial services companies, and many other industries.
Developers in those companies need to have some way to collaborate, and integrate with their DevOps toolchains and legacy backends, and Mattermost is getting increasingly popular there.
Every open source Mattermost server has all the core features of Slack, including Slack-compatible keyboard shortcuts, and Slack integrations via webhooks. Every Mattermost server can host hundreds of Slack-compatible teams, and every month over 10,000 servers are downloaded.
Also, if you've installed GitLab already, you just turn on Mattermost as a feature in omnibus. It's really simple to start. When you get to a few hundred users and IT needs to add some more admin and permissions there's some additional setup, but then you can go to hundreds or thousands of users from that setup.
https://venturebeat.com/2019/06/19/mattermost-raises-50-mill...