What is the main difference between Fluxer and Mattermost?

Fluxer and Mattermost are both team chat & messaging tools but differ in their approach, features, and target audience. Compare their GitHub stats, technology stack, and community adoption to make the best choice.

Which is better: Fluxer or Mattermost?

The choice between Fluxer and Mattermost depends on your specific needs, technical requirements, and team preferences. Both are quality open source solutions with active communities.

Can I migrate from Fluxer to Mattermost?

Migration between Fluxer and Mattermost is possible but requires careful planning. Consider data export/import capabilities, feature parity, and potential workflow changes.

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Fluxer vs Mattermost

Learn how Fluxer and Mattermost differ in their key features, development activity, technology stack and community adoption, so you can decide which of these team chat & messaging tools is best for you.

Fluxer

Free, open-source instant messaging and VoIP platform with full Markdown support, voice/video calls, moderation tools, and self-hosting options for communities.

Visit Fluxer Read more

10,620stars+294(+2.8%)

Last 30 days

Last commit
1 day ago
Repository age
10 months
Version
2026.1019.95336
License
AGPL-3.0
Self-hosted
Yes
Repository
fluxerapp/fluxer

Mattermost

Mattermost provides a flexible, open-source platform for secure team collaboration, designed for organizations with strict security and privacy requirements.

Visit Mattermost Read more

39,384stars+265(+0.7%)

Last 30 days

Last commit
7 hours ago
Repository age
11 years
Version
v12.0.0
Self-hosted
Yes
Repository
mattermost

Detailed Comparison

Both Fluxer and Mattermost have their unique strengths and serve similar purposes effectively. Consider your specific needs regarding popularity, growth, activity, technology, maturity, licensing and features when making your decision.

Mattermost wins

Community & Popularity

Mattermost significantly outpaces Fluxer in community adoption with 39,384 stars compared to 10,620 stars on GitHub. This 3.7x difference suggests Mattermost has a much larger and more active community. In terms of developer contributions, Mattermost has 9,059 forks, indicating strong developer engagement.

Fluxer wins

Growth Momentum

Fluxer is growing faster, adding 294 stars in the last 30 days (+2.8%) against adding 265 stars for Mattermost (+0.7%). Fluxer is the smaller project of the two, so it is closing the gap rather than extending a lead.

Comparable

Development Activity

Both projects show recent activity, with Fluxer last updated 1 day ago and Mattermost 7 hours ago.

Comparable

Technology Stack

Both tools share common technology foundations, being built with JavaScript, CSS, Bash, Typescript, JSX, Golang. However, they differ in their additional technology choices: Fluxer uses Python, Rust, Ruby while Mattermost leverages SCSS.

Mattermost wins

Project Maturity

Mattermost has been in development longer, starting 11 years ago, compared to Fluxer which began 10 months ago. This 10.7-year head start suggests Mattermost may have more mature features and established processes.

Fluxer wins

Licensing

Fluxer is licensed under AGPL-3.0, while Mattermost's license terms are not publicly specified.

Comparable

Use Cases & Features

Both tools serve similar use cases in Team Chat & Messaging, Encrypted Communication. However, they also have distinct specializations: Mattermost extends into Collaborative Workspaces.

Comparable