There is an open-source alternative to almost any SaaS, what do you use?
An alternatives thread in r/selfhosted (350 comments) where Mattermost is the tool being moved away from or compared against.
Collected Oct 16, 2015 – Jun 16, 2026
Distinct communities
Modeled stance set
Static snapshot, not a live feed
Illustrative data: This illustrative report summarises 38 public Reddit threads collected across 8 subreddits through the Reddit search API. Thread counts, subreddit shares, the weekly trend, and the date range are computed from those threads alone. Sentiment labels are derived from title keywords, not human review. This is a sample of public discussion, not a complete or representative measure of it, and not a customer satisfaction score.
Editorial verdict
Illustrative verdict
38 public Reddit threads about Mattermost were collected across 8 subreddits, led by r/selfhosted. The dominant question type is alternative shopping (10 of 38), and the highest-scoring thread in the sample is "There is an open-source alternative to almost any SaaS, what do you use?". This report summarises those threads only; it is not a measure of Mattermost's overall standing.
Illustrative stance mix: 3% positive · 97% neutral · 0% negative across 38 collected threads, labelled from title keywords rather than by hand.`
Primary decision lens
Where the conversation happens
Most common complaint
Users actively seeking alternatives
Slack (7), Discord (4), Zulip (2) appear alongside Mattermost in these threads, so a realistic shortlist priced against Mattermost usually includes them.
3 comparison threads weigh Mattermost against rivals, and the corpus does not show it as the default pick in any of them.
Where the conversation happens · Who it gets evaluated against · What buyers are actually asking · How current the signal is
Discussion pattern
Community distribution
r/selfhosted
r/Mattermost
r/sysadmin
r/webdev
r/SaaS
r/ClaudeAI
Sentiment distribution
3%
1 threads
97%
37 threads
0%
0 threads
Recurring themes
Where the conversation happens
Mattermost discussion collected here spans 8 subreddits, led by r/selfhosted (68%), r/Mattermost (11%), r/sysadmin (8%). The most-commented thread in the sample is "There is an open-source alternative to almost any SaaS, what do you use?" (350 comments in r/selfhosted).
Users actively seeking alternatives
The largest negative signal is 10 threads asking for something other than Mattermost, concentrated in r/selfhosted.
Review the remaining decision and diligence themes for Mattermost, each tied to a public thread ID.
Already have an account? Log in
Switching & migration signals
10
Threads asking for alternatives
1
Threads about cost or plans
1
Titles mentioning a switch
1
Titles mentioning cancelling
See exactly which alternatives Reddit users say they are moving to from Mattermost — and how often each one comes up.
Already have an account? Log in
Source trail
An alternatives thread in r/selfhosted (350 comments) where Mattermost is the tool being moved away from or compared against.
A r/selfhosted discussion (119 comments) that references Mattermost in the course of a broader conversation.
An open recommendation request in r/selfhosted (48 comments) where Mattermost comes up as a candidate.
Open the remaining direct Reddit posts used to define the research questions for this illustrative report.
Already have an account? Log in
Methodology & limitations
Reader questions
Use RedditMaster Campaign Mode to monitor relevant keywords and surface buyer-intent conversations.