XDA’s piece on the budget NAS that turned into the biggest power hog in the house captured a quiet truth about home servers in 2026. A second-hand desktop tower draws between 60 and 120 watts at idle, which is hundreds of kilowatt-hours a year before it serves a single byte. The maths on a Raspberry Pi 5 or a fanless N100 mini PC works differently. Both idle under 10 watts, both run a 24/7 stack of containers without flinching, and the apps that wrap them have grown polished enough that you do not lose features by switching off the tower. We tested 8 of the best apps for a low-power home server in 2026 on Pi 5 hardware and on N100 mini-PCs.
The list is a mix of dashboards that put a friendly face on a Docker stack, OS-level options that turn a small board into a self-hosted appliance, and admin tools for the part of the stack that still wants a terminal. Every pick runs on ARM (most of them) or AMD64 (all of them), all of them on Linux, and a few of them on Windows or macOS for the tinkerer who wants a single host for everything. Every pick is free.
What to look for in a low-power home-server app
Pick an app that:
- Runs on ARM cleanly. Raspberry Pi and Pi-class boards remain the cheapest low-power host you can buy, and ARM support cannot be an afterthought.
- Survives a power blip. Persistent volumes, sane defaults on restart, and a working backup story matter more on a home server than they ever did on a desktop.
- Keeps containers in one place. The point of a dashboard is to see what is running, restart what is not, and stop a runaway log without leaving the browser.
- Updates without breaking. A release cadence that respects semantic versioning and a tested update flow is what separates weekend projects from household infrastructure.
- Plays nicely with Tailscale or similar. The era of port-forwarding a NAS to the open internet is over; the home server lives behind an overlay network.
Quick comparison
| App | Best for | Free plan | ARM support | Hardware footprint |
|---|---|---|---|---|
| CasaOS | A friendly Docker dashboard for beginners | Yes | Yes | Pi 4 or better |
| Umbrel | Polished personal-cloud appliance | Yes | Yes | Pi 4 or better |
| OpenMediaVault | The NAS OS focused on storage | Yes | Yes | Pi 4 or better |
| DietPi | Minimal Debian image with one-click installs | Yes | Yes | Pi Zero 2 and up |
| Yunohost | Self-hosting OS for non-experts | Yes | Yes | Pi 4 or better |
| Cosmos Cloud | All-in-one with built-in proxy and identity | Yes | Yes | Pi 5 or better |
| Tipi | Lightweight one-line installer | Yes | Yes | Pi 4 or better |
| Cockpit | Web-based Linux admin for the tinkerer | Yes | Yes | Any Linux host |
The 8 best apps for a low-power home server
1. CasaOS — best Docker dashboard for beginners
CasaOS is the option to start with if you have never run a home server. The install is a single curl-and-pipe-to-bash on any Debian-based host, the dashboard hands you a Docker registry of one-click apps (Jellyfin, Pi-hole, Nextcloud, Plex, Vaultwarden), and the file-manager-style UI looks closer to a phone home screen than a Linux server. On a Pi 5 the whole stack sits under 4 watts at idle.
Where it falls short: The opinionated UI gets in the way when you want a custom Docker compose stack, and the user model is shallow. Power users hit the limits after a few months and move to a thinner orchestrator.
Pricing:
- Free: Fully free, MIT-licensed
- Paid: None
Platforms: Linux on ARM and x86. CasaOS does not officially support Windows or macOS hosts.
Download: CasaOS
Bottom line: Pick CasaOS if you want the lowest-friction onboarding into self-hosting. Skip it once you are comfortable writing a Docker compose file by hand.
2. Umbrel — best polished personal cloud appliance
Umbrel started as a Bitcoin-node OS and broadened into a general-purpose personal-cloud appliance. The dashboard is the best-looking in this list, the app store covers the same Jellyfin/Immich/Vaultwarden core, and the household experience is the closest a self-hosted stack gets to a consumer NAS. The 2025 release added a real backup-and-restore tool that other dashboards still lack.
Where it falls short: Umbrel makes opinionated decisions that are sometimes hard to override. The proprietary parts of the project are not a deal-breaker but are worth knowing. Customising containers outside the app store needs more work than CasaOS.
Pricing:
- Free: Fully free for personal use, partial source-available licence
- Paid: None for the personal tier
Platforms: Linux on ARM and x86, plus official Umbrel Home hardware.
Download: Umbrel
Bottom line: Pick Umbrel if you want the most polished consumer experience and you are happy with a curated app store. Skip it if you want a fully open and customisable orchestrator.
3. OpenMediaVault — best storage-focused NAS OS
OpenMediaVault is the option for the user whose primary need is storage. SMB and NFS shares, snapshot tools, RAID management, and a long history of stable releases mean OMV is the most boring choice in this list, in the best sense. Adding Docker through the plugin extends it into a general-purpose host without losing the storage focus.
Where it falls short: The UI shows its age and the storage focus means the Docker side is a plugin rather than a first-class feature. Set-up is harder than CasaOS or Umbrel for a first-timer.
Pricing:
- Free: Fully free under GPL
- Paid: None
Platforms: Debian on ARM and x86, including a dedicated install image.
Download: OpenMediaVault
Bottom line: Pick OpenMediaVault if storage is the reason the server exists and a dashboard is a nice-to-have. Skip it if you want the dashboard to lead.
4. DietPi — best minimal image for tiny boards
DietPi is the choice for the user who wants to squeeze a home server onto a Pi Zero 2, an old SBC, or any board with under a gigabyte of RAM. The image is a stripped Debian with a TUI installer that lists every common self-hosted app and installs them with a single keypress. Memory and CPU footprint are the smallest in this list.
Where it falls short: There is no web dashboard. Everything happens in the SSH terminal. New users without a Linux comfort zone will struggle.
Pricing:
- Free: Fully free under GPL
- Paid: None
Platforms: Linux on ARM and x86, optimised for small SBCs.
Download: DietPi
Bottom line: Pick DietPi if the hardware is small enough that wasted RAM matters and you are happy in the terminal. Skip it for a friendly UI.
5. Yunohost — best self-hosting OS for non-experts
Yunohost is built on the premise that self-hosting should not require a sysadmin. The web admin handles user accounts, domain setup, SSL via Let’s Encrypt, email, calendar, and a curated catalogue of apps that read more like consumer software than container images. For a household that wants a private cloud without learning Docker, Yunohost is the cleanest path.
Where it falls short: The opinionated user system is a feature for non-experts and a constraint for the rest. The catalogue is curated, which means apps land later than on a Docker dashboard.
Pricing:
- Free: Fully free under AGPLv3
- Paid: None
Platforms: Debian on ARM and x86.
Download: Yunohost
Bottom line: Pick Yunohost if you want a real OS-level self-hosting experience without Docker fluency. Skip it if you want full container control.
6. Cosmos Cloud — best all-in-one with proxy and identity
Cosmos Cloud is the youngest project in this list and the most ambitious. It bundles Docker management, a reverse proxy, identity management, a download manager, and a notification system into a single dashboard, all designed to live behind Tailscale. The 2025 releases have been the most active of any project here.
Where it falls short: Young means rough. The integrated identity provider conflicts with apps that have their own user system, and the documentation is catching up. Production stability is best on x86; the ARM path is functional but newer.
Pricing:
- Free: Fully free under Apache 2.0
- Paid: None
Platforms: Linux on x86 and ARM.
Download: Cosmos Cloud
Bottom line: Pick Cosmos Cloud if you want a single tool that handles proxy, identity, and container management together. Skip it if production stability today matters more than the trajectory.
7. Tipi — best lightweight one-line installer
Tipi is the streamlined version of the CasaOS idea. A single install command on Debian or Ubuntu, a small app catalogue covering the popular self-hosted picks, and a dashboard that hides Docker entirely. The performance footprint is smaller than CasaOS on the same hardware, which matters on a Pi 4 with 4 GB of RAM.
Where it falls short: The catalogue is smaller. The community is smaller. Apps land more slowly. Customisation outside the catalogue is harder.
Pricing:
- Free: Fully free under GPLv3
- Paid: None
Platforms: Linux on ARM and x86.
Download: Runtipi
Bottom line: Pick Tipi if you want the CasaOS idea on tighter hardware. Skip it if you need a deeper app catalogue.
8. Cockpit — best web admin for the tinkerer
Cockpit is not a self-hosting dashboard, it is a web-based Linux admin tool. Storage, network, services, podman containers, and logs are all visible in one browser tab. The advantage on a low-power host is that Cockpit replaces the need to SSH in for routine administration without taking the system over the way an opinionated dashboard does.
Where it falls short: No app store. No friendly install flow for self-hosted apps. You write your own Docker compose files and add them to systemd.
Pricing:
- Free: Fully free under LGPL
- Paid: None
Platforms: Linux on ARM and x86. Native integration on Fedora, RHEL, Ubuntu, Debian.
Download: Cockpit
Bottom line: Pick Cockpit if you already write your own compose files and want a thin admin layer. Skip it if you want apps to install themselves.
How to pick the right one
If you are starting out and want the friendliest dashboard: CasaOS. If you want the most polished consumer-feel appliance: Umbrel. If storage is the headline use case: OpenMediaVault. If your hardware is a Pi Zero 2 or older SBC: DietPi.
If you want a private-cloud OS without learning Docker: Yunohost. If you want the most ambitious all-in-one with built-in proxy and identity: Cosmos Cloud. If you want a lightweight CasaOS on tighter hardware: Tipi. If you already write Docker compose files and want a thin web admin: Cockpit.
FAQ
What is the most power-efficient home server in 2026?
A Raspberry Pi 5 idles at around 3 to 5 watts and is the cheapest option that runs every app in this list. An N100 mini-PC sits between 6 and 10 watts at idle and gives you noticeably more CPU headroom for the same power envelope. Both are dramatically more efficient than a repurposed desktop tower.
Can I run any of these on Windows?
Cockpit is Linux-only. The rest run inside WSL2 on Windows for testing, but the recommended production path is a Linux host. Windows draws more power at idle than a similarly sized Linux host, which conflicts with the low-power goal.
Do any of these support automatic backups?
Umbrel ships a built-in backup-and-restore tool. CasaOS, OpenMediaVault, and Yunohost have backup options through plugins or the host’s filesystem snapshots. Cosmos Cloud has a backup module in active development.
Which app is easiest for a first-time self-hoster?
CasaOS and Umbrel tie for the most accessible first install. Yunohost is the cleanest if you also want email and shared calendars without configuring them by hand.
Will a Raspberry Pi 5 run Jellyfin, Immich, and Vaultwarden together?
Yes, comfortably, on the 8 GB model. A handful of users will hit the limits with simultaneous 4K transcodes; the Pi 5 does not transcode well in Jellyfin. For direct-play and the rest of the stack, the Pi 5 is enough for a household of four.
