mStream vs Polaris
A side-by-side comparison of two self-hosted media servers options — licensing, setup difficulty, resource needs, and what each one replaces.
Polaris
Music streaming server focused on speed and simplicity
| Feature | mStream | Polaris |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Health score | 86 · Excellent | 75 · Good |
| Category | Media Servers | Media Servers |
| License | GPL-3.0 | MIT |
| Language | JavaScript | Rust |
| Setup difficulty | Easy | Easy |
| Min. RAM | 256 MB | 128 MB |
| Deployment | docker, bare-metal, binary | docker, binary, bare-metal |
| GitHub stars | ★ 2,397 | ★ 2,731 |
| First released | 2016 | 2017 |
| Replaces | Spotify | Spotify |
What are mStream and Polaris?
mStream
mStream is a personal music streaming server that you can run on any computer to access your music from anywhere. It includes mobile apps for offline downloads and playlist syncing.
- Cross-platform mobile apps
- Offline song downloads
- Playlist sync
- Lightweight server
Polaris
Polaris is a self-hosted music streaming application written in Rust, designed to be fast and easy to set up. It lets you browse and stream your music collection from a clean web interface or compatible clients.
- Written in Rust for speed
- Simple setup
- Last.fm integration
- Collection browsing
mStream vs Polaris: key differences
MStream is written in JavaScript, while Polaris is built with Rust. Licensing differs — GPL-3.0 for mStream versus MIT for Polaris. Polaris is the lighter option, starting around 128 MB of RAM against 256 MB for mStream.
Why pick each one
Choose mStream if…
- Easy to install
- Good mobile experience
Watch out for
- Basic web UI
- Slower release cadence
Choose Polaris if…
- Low resource usage
- Single binary deployment
Watch out for
- Smaller ecosystem
- Fewer client options
Frequently asked questions
Is mStream or Polaris better?
Neither is universally better. Polaris has the larger community; both share a easy setup difficulty, so the decision comes down to features and licensing.
Are mStream and Polaris free and open-source?
Yes. mStream is licensed under GPL-3.0 and Polaris under MIT. Both can be self-hosted at no software cost.
Can I run mStream and Polaris with Docker?
mStream: yes. Polaris: yes.
Which is lighter on resources, mStream or Polaris?
Polaris has the smaller minimum footprint at 128 MB of RAM, compared to about 256 MB for mStream. Real-world usage depends on library size, user count, and enabled features.