Janky UX and missed notifications led team back to Slack → Slack
“frictional jank related to mattermost that just made it less smooth to use and more annoying, with the occasional missed notification”
Mattermost alternatives: where its users went, and why they left
Mattermost (mattermost.com) has 22 sourced reports on Friction, drawn from 79 public source threads (as of 2026-10-15), 3 of them describing a move away. This page reads them for one question: if you are leaving Mattermost, what do its users say they moved to, and what pushed them out?
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Where Mattermost users say they went
Switching reports that name a destination. A count is the number of reports naming it, not a market share: Friction only holds what people say in public.
| Named alternative | Reports naming it | Newest report |
|---|---|---|
| Chatto | 2 | 2026 |
| Slack | 2 | 2021 |
| Zulip (compare) | 1 | 2025 |
| Discord | 1 | 2023 |
In their words
Running the server was not worth the effort for a non-IT company → Slack
“Our competency is not managing mattermost, it's doing what the company is made to do”
Feature downgrades in community version rule it out for FOSS communities → Zulip
“Mattermost would be out of the question for their feature downgrades in the community version as of late”
What pushes people away from Mattermost
The most-reported open problems, worst severity first. Each links to the item with its source.
Upgrade from 5.38 to 6.0 fails with a database column conversion error · Self-hosting & upgrades · Blocks work · 5 people
“Migrate from 10.11.17 to 11.17.0 and observe a migration failure”
Typing outside an inline edit can alter the old post · Reliability & bugs · Blocks work
“The text goes into the open inline edit box and is inserted at the very beginning of the old message”
Private-channel messages do not trigger desktop notifications or badges · Reliability & bugs · Blocks work
“No desktop notification is shown”
Frequent Firefox freezes after upgrade to 10.5.4 · Performance · Blocks work
“I have had very frequent freeze when writing message or going back to the mattermost tab it would show a loading wheel”
Price doubled twice and upsold to more than Office 365 costs · Pricing & plans · Annoyance · 3 people
“I will keep an eye on this! We’re currently using Mattermost, but their pricing is a bit all over the place and targeted for enterprise”
See all 18 themes for Mattermost
Other team chat tools on Friction, and what their users struggle with
Switching trades one set of problems for another. The same evidence, for each tool Friction covers in this category:
Rocket.Chat
17 reports · 91 source threads · most-discussed area: Reliability & bugs
- Message search date filters shift with timezone differences
- Node version ranges break NVM-based container setup
- LTS changes were announced with little notice
Mattermost vs Rocket.Chat: side by side · Rocket.Chat alternatives
Zulip
17 reports · 57 source threads · most-discussed area: UI & usability
Counts and reports reflect people who post in public (developers and technical buyers are over-represented). A tool with fewer reports is not a better tool; it may only be discussed less. How the data is built.