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It's a question that comes up in every home lab and self-hosting community: should you buy a dedicated NAS, or build your own home server? Both can store files, run services, and host your media library. But they go about it very differently — and the right choice depends heavily on what you actually want to do.
This guide breaks down both options honestly, without assuming you need one over the other. We'll cover use cases, costs, power draw, and the growing middle ground between the two.
What Is a NAS?
A NAS (Network Attached Storage) is a purpose-built device designed primarily for storing and sharing files over a network. Think of it as a smart external hard drive that connects to your network rather than directly to a computer. Major NAS brands include Synology, QNAP, and Western Digital (My Cloud).
Modern NAS devices run a full operating system — Synology's DSM or QNAP's QTS — with a web-based management interface. They support file sharing via SMB, NFS, AFP, and FTP, can run media servers like Plex or Jellyfin, and often include built-in apps for backups, surveillance cameras, and productivity tools. High-end models even support running Docker containers and virtual machines.
What Makes a NAS Special
The defining feature of a NAS is its storage focus. The hardware is optimised for continuous drive operation — typically with good thermal management for spinning drives, support for drive hibernation, and RAID array management built into the OS. Synology's DSM is particularly mature: it's intuitive, actively maintained, and has a large ecosystem of first-party and third-party apps.
What Is a Home Server?
A home server is a general-purpose computer running server software. It could be an old desktop PC, a refurbished rack server, a mini PC, or a Raspberry Pi 5. The key distinction is flexibility: a home server runs whatever OS and software you install on it — TrueNAS, Ubuntu Server, Debian, Proxmox, Windows Server, or anything else.
The home server approach gives you complete control. You're not locked into a vendor's app ecosystem. You can run any containerised application, any Linux service, any programming environment. But that flexibility comes at the cost of complexity — you're responsible for your own configuration, updates, and troubleshooting.
Key Differences at a Glance
| Aspect | NAS | Home Server |
|---|---|---|
| Setup complexity | Low — guided setup | High — manual configuration |
| Software flexibility | Limited to vendor apps + Docker | Run anything |
| RAID management | Built-in, automated | Manual (mdadm, ZFS, TrueNAS) |
| Power consumption | Low (10–40W typical) | Higher (30–150W typical) |
| Processing power | Limited (especially budget models) | Scalable — use any CPU |
| Cost at entry level | £200–400 (diskless) | £150–600+ (varies widely) |
| Ongoing maintenance | Low | Higher |
| Community and support | Excellent (Synology/QNAP) | Good but fragmented |
When to Choose a NAS
You Just Want File Storage That Works
If your primary goal is reliable, easy-to-manage file storage with a polished web interface, buy a Synology. DSM's file management, automatic RAID rebuilding, cloud sync, and mobile apps are genuinely excellent out of the box. You can be up and running in under an hour with no Linux knowledge required.
You Want Plex or Jellyfin Without the Fuss
High-end NAS devices (Synology DS923+ and above, QNAP TS-464) have enough CPU for 1–2 simultaneous 1080p Plex transcodes and can handle 4K direct play for almost any client. If you mostly direct-play media (client decodes, NAS just streams), even budget 2-bay NAS units work fine. For heavy transcoding, you need a home server with a proper CPU or GPU.
You Want Low Power Consumption
A 2-bay Synology NAS at idle draws 15–20W. A 4-bay model with drives spinning down draws 20–30W. Compare this to even a modest mini PC server at 30–60W idle, and the annual electricity cost difference adds up. If the server runs 24/7 (and it will), this matters.
You Prefer Not to Maintain a Linux System
Not everyone wants to manage package updates, check logs, and troubleshoot broken services at 11pm. A NAS handles its own updates and runs smoothly with minimal intervention. This is a genuinely valuable feature if networking is a hobby, not a passion.
When to Choose a Home Server
You Want to Run Many Services
Docker on a NAS works, but you're constrained by the vendor's implementation and the limited CPU power in budget NAS hardware. A home server running Proxmox or Docker on Ubuntu lets you run Home Assistant, Plex, Jellyfin, Nextcloud, Vaultwarden, AdGuard Home, Immich, and dozens more services simultaneously without breaking a sweat — depending on your CPU choice.
You Need Significant Compute Power
4K transcoding in Plex, large Stable Diffusion workloads, or running multiple VMs requires a CPU (and potentially GPU) far beyond what NAS devices offer. A home server with an Intel N100 mini PC provides multiple times the compute of a budget NAS at a similar price. An i5/i7-based system is in a completely different league.
You Want TrueNAS Scale or Unraid
TrueNAS Scale brings enterprise-grade ZFS storage with a familiar web interface, while Unraid is famous for its parity-based storage and Docker support. Both run on standard PC hardware. They give you the polished interface of a commercial NAS with the flexibility of a home server. This is one of the most popular choices in home lab communities.
You Already Have a Spare PC
If you have an old desktop or laptop gathering dust, turning it into a home server costs almost nothing beyond drives. Even an older Core i5 or i7 desktop can outperform a £400 NAS for compute tasks. Add a couple of large hard drives and you have a capable home server for under £200 total.
Power Consumption and Running Costs
Power is the hidden cost of always-on devices. In the UK at current electricity rates (~28p/kWh), a device drawing 50W continuously costs approximately £120/year. Here's a rough comparison:
- 2-bay NAS (Synology DS223): ~18W idle → ~£44/year
- 4-bay NAS (Synology DS923+): ~30W idle → ~£74/year
- Intel N100 mini PC server: ~12–25W idle → ~£29–62/year
- Refurb Core i5 desktop server: ~40–80W idle → ~£98–196/year
- Rack server (Xeon): ~100–200W idle → ~£245–490/year
For always-on use, the Intel N100 mini PC running TrueNAS or Proxmox represents remarkable value — close to NAS-level efficiency with full home server flexibility. This is why the N100 mini PC has become so popular in the home lab community.
The Hybrid Approach
Many experienced home labbers end up with both: a NAS for reliable, low-power primary storage, and a home server (often a mini PC) for running services and compute workloads. The NAS stores files and runs simple backups; the server runs Docker containers, Home Assistant, and anything compute-intensive. The two communicate over the local network.
This hybrid approach separates concerns cleanly. Storage lives on the NAS (reliable, maintained, low power). Services run on the server (flexible, compute-rich). When the server crashes or needs maintenance, your files remain accessible. It's the most robust and scalable architecture for serious home networks.
Our Recommendations
Choose a NAS if...
You want reliable file storage with minimal setup and maintenance. You're not interested in running multiple services. You prefer a polished, vendor-supported interface. Power efficiency is a priority.
Choose a Home Server if...
You want to self-host many services. You need significant compute power. You're comfortable with Linux or willing to learn. You want maximum flexibility and don't mind occasional tinkering.
Choose Both if...
You've been doing this for a while, you know what you want, and you've accepted that the home lab is a journey, not a destination. Start with one and see where it leads.
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