Lidarr vs Polaris
A side-by-side comparison of two self-hosted media servers options — licensing, setup difficulty, resource needs, and what each one replaces.
Lidarr
Music collection manager and download automation tool
VS
Polaris
Music streaming server focused on speed and simplicity
| Feature | Lidarr | Polaris |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Health score | 84 · Excellent | 75 · Good |
| Category | Media Servers | Media Servers |
| License | GPL-3.0 | MIT |
| Language | C# | Rust |
| Setup difficulty | Medium | Easy |
| Min. RAM | 512 MB | 128 MB |
| Deployment | docker, bare-metal | docker, binary, bare-metal |
| GitHub stars | ★ 5,679 | ★ 2,731 |
| First released | 2017 | 2017 |
| Replaces | Spotify | Spotify |
What are Lidarr and Polaris?
Lidarr
Lidarr is the music collection manager for the *arr suite, automating searches and downloads for your favorite artists. It monitors releases and integrates with download clients and media servers.
- Automated music collection management
- Release monitoring
- Download client integration
- Quality profiles
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
Lidarr vs Polaris: key differences
Lidarr is written in C#, while Polaris is built with Rust. Licensing differs — GPL-3.0 for Lidarr versus MIT for Polaris. Polaris is the lighter option, starting around 128 MB of RAM against 512 MB for Lidarr. Lidarr has the considerably larger community, at 5,679 GitHub stars versus 2,731.
Why pick each one
Choose Lidarr if…
- Part of the popular *arr suite
- Strong automation
Watch out for
- Metadata accuracy varies
- Companion to a media server
Choose Polaris if…
- Low resource usage
- Single binary deployment
Watch out for
- Smaller ecosystem
- Fewer client options
Frequently asked questions
Is Lidarr or Polaris better?
Neither is universally better. Lidarr has the larger community, while Polaris is simpler to set up (easy difficulty). Choose based on the comparison table above and your own setup.
Are Lidarr and Polaris free and open-source?
Yes. Lidarr is licensed under GPL-3.0 and Polaris under MIT. Both can be self-hosted at no software cost.
Can I run Lidarr and Polaris with Docker?
Lidarr: yes. Polaris: yes.
Which is lighter on resources, Lidarr or Polaris?
Polaris has the smaller minimum footprint at 128 MB of RAM, compared to about 512 MB for Lidarr. Real-world usage depends on library size, user count, and enabled features.