Synology vs QNAP vs UGREEN vs TerraMaster: Which NAS Should You Buy?

Quick Summary (TL;DR):
There is no single NAS brand that is best at everything. Synology remains the strongest choice when you value a tightly integrated storage, backup, snapshot, photo and administration ecosystem more than maximum hardware specification. QNAP suits buyers who want a NAS to behave more like a flexible server, with strong container and virtual-machine support, PCIe expansion on many models and a broad application stack. UGREEN NASync is the hardware-value option: current models such as the DXP4800 Plus combine 8GB DDR5, 10GbE, 2.5GbE, dual M.2 and Docker/VM support, but UGOS Pro is a newer platform than DSM or QTS. TerraMaster sits between appliance NAS and enthusiast server: current hardware such as the F4-425 Plus is unusually generous with 16GB DDR5, three M.2 slots and dual 5GbE, while TOS 7 now has a container-first architecture with Docker Compose support. Choose the brand based on your workload and how much you value software polish versus hardware flexibility—not the logo on the enclosure.

Synology vs QNAP vs UGREEN vs TerraMaster at a Glance

Brand	Core strength	Main trade-off	Best fit
Synology	Integrated DSM software, backups, snapshots and storage management	Hardware specifications can look conservative for the price	Backup-first NAS, family storage, businesses wanting appliance-style management
QNAP	Flexible server features, containers, VMs and hardware expansion	More features also mean more configuration choices	Power users, virtualisation, surveillance, mixed server workloads
UGREEN	Strong CPU/RAM/network hardware for the enclosure tier	UGOS Pro is a newer ecosystem	Docker-heavy homes, fast networking, hardware-focused buyers
TerraMaster	Competitive hardware plus increasingly open container tooling	Smaller software/support ecosystem than Synology/QNAP	Enthusiasts who value hardware and Docker flexibility

The correct brand depends on whether your NAS is primarily a storage appliance, a home server, a media machine, or some combination of all three.

Start with the Workload, Not the Brand

Before comparing operating systems, decide what the NAS must actually do.

• Simple PC and phone backups.
• Family file and photo storage.
• Home Assistant backups.
• Docker containers.
• Virtual machines.
• Plex or Jellyfin.
• Immich or other photo applications.
• Surveillance recording.
• Large 2.5GbE/5GbE/10GbE transfers.
• Off-site backup and disaster recovery.

A NAS that is excellent for protected family storage may not be the best platform for ten Docker containers and several VMs. Conversely, a specification-heavy server NAS can be unnecessary if it spends its life storing backups over Gigabit Ethernet.

For a Home Assistant-specific shortlist, see Best NAS for Home Assistant Backups and Docker.

Synology: Buy the Software Ecosystem First

Synology’s strongest argument remains DSM, not the CPU printed on the product page.

DSM brings together:

• Storage Manager.
• Btrfs on supported models.
• Synology Hybrid RAID (SHR).
• Hyper Backup.
• Snapshot Replication.
• Synology Drive.
• Synology Photos.
• Active Backup tools on supported systems.
• Container Manager on compatible models.
• Virtual Machine Manager on compatible models.

The advantage is not that competitors lack backups, snapshots or Docker. It is that Synology has built a broad set of first-party storage applications around one consistent interface and support model.

Synology Is Particularly Strong for Backup-First Buyers

If your priority is protecting:

• Windows and Mac computers.
• Family photos.
• Shared documents.
• Home Assistant backups.
• Another NAS.
• Cloud data.

DSM’s backup and snapshot ecosystem is an obvious reason to accept less spectacular CPU or networking specifications than similarly priced hardware from newer competitors.

Synology Hardware Is More Conservative

The current DS925+ is a good example of Synology’s approach. It uses a four-core/eight-thread AMD Ryzen V1500B, ships with 4GB ECC DDR4, provides four SATA bays, two M.2 slots and dual 2.5GbE.

That is enough for file services, backups, Container Manager and supported virtual-machine workloads, but hardware-focused buyers will immediately notice that UGREEN and TerraMaster offer more RAM and faster network interfaces in current competing tiers.

Synology officially lists Virtual Machine Manager on the DS925+ and recommends up to eight VM instances depending on memory and configuration, so “Synology cannot virtualise” is not accurate. The point is simply that its buying proposition is software-led rather than specification-led.

Synology’s 2025 Drive Policy Has Changed Under DSM 7.3

Older comparisons often criticise the 2025 Plus-series systems for restrictive drive policies. That needs updating.

Under DSM 7.3, Synology now allows third-party HDDs and 2.5-inch SATA SSDs that are not on its compatibility list to create storage pools on 2025 DS Plus desktop models. Synology still recommends verified drives and support can be limited where an unverified drive is involved in a problem.

M.2 NVMe remains more restrictive: on the affected DS Plus systems, unlisted NVMe devices are not supported for creating new M.2 storage pools or cache.

So “Synology requires branded hard drives” is now too simplistic, but drive policy still deserves checking before purchase.

QNAP: The Most Server-Like Traditional NAS Platform

QNAP generally exposes more of the NAS as a general-purpose server platform.

Its software stack includes:

• Container Station.
• Virtualization Station.
• Virtual Switch networking.
• Hybrid Backup Sync.
• Snapshot tools.
• QVR surveillance applications.
• QVPN.
• iSCSI and storage services.
• PCIe-based expansion on many models.

Container Station supports Docker and Linux container technologies, while Virtualization Station supports full virtual-machine workflows on compatible hardware.

QNAP Hardware Often Provides More Expansion Paths

The current TS-464 remains a useful example:

• Intel Celeron N5095.
• Four SATA bays.
• Two M.2 2280 PCIe slots.
• Two DDR4 SO-DIMM slots.
• Up to 16GB officially supported memory.
• Dual 2.5GbE.
• PCIe expansion.
• Container Station.
• Virtualization Station.

The PCIe slot is especially useful because it lets some QNAP systems evolve through faster networking or other supported expansion rather than forcing an enclosure replacement.

QNAP Suits Buyers Who Enjoy Configuring Their Server

The flip side of flexibility is that QNAP exposes more decisions.

• Virtual switches.
• Container networking.
• Several backup applications and destinations.
• PCIe cards.
• Multiple multimedia and surveillance packages.
• More opportunities to design the NAS as infrastructure rather than an appliance.

For an experienced home-lab user this is a strength. For someone who wants a box that quietly stores family photos and backups, the additional flexibility may not provide much benefit.

UGREEN: Strong Hardware and a Rapidly Expanding UGOS Pro Ecosystem

UGREEN entered the NAS market from a different direction: lead with unusually strong hardware specifications and build the software ecosystem quickly around them.

The DXP4800 Plus illustrates the strategy:

• Intel Pentium Gold 8505, 5 cores / 6 threads.
• 8GB DDR5.
• Up to 64GB memory expansion.
• Four SATA bays.
• Two M.2 NVMe slots.
• 128GB SSD system drive.
• One 2.5GbE port.
• One 10GbE port.
• 4K HDMI.
• Docker support.
• Virtual-machine support.

Those specifications make UGREEN attractive to buyers who intend to run Docker, databases, photo applications, private cloud services and other workloads rather than using the NAS only as a file server.

UGOS Pro Is Better Than Early NASync Reviews Suggest

The software platform has evolved rapidly. Current UGOS Pro provides Docker through the App Center, Docker Compose-style project management, virtual-machine support on DXP models, file services, RAID management, multimedia applications and backup tools.

That means early launch-era reviews no longer describe the complete current software set.

However, DSM and QTS still have the advantage of a much longer history in NAS software and a larger established body of administration documentation, community knowledge and first-party applications.

UGREEN Makes the Most Sense for Docker-Heavy Buyers

If your planned NAS looks like this:

NAS
├── backups
├── SMB/NFS storage
├── Home Assistant Container
├── Immich
├── Pi-hole
├── Vaultwarden
├── Nextcloud
└── other Docker services

the generous RAM ceiling, Intel x86 CPU and fast networking of current NASync models are compelling.

The question becomes whether those hardware advantages are more valuable to you than the deeper storage/application ecosystem offered by the older NAS vendors.

TerraMaster: Competitive Hardware with a More Open TOS 7 Direction

TerraMaster has also moved aggressively toward enthusiast and home-server workloads.

The current F4-425 Plus is a strong example:

• Intel N150.
• 16GB DDR5 installed.
• Up to 32GB supported memory.
• Four SATA bays.
• Three M.2 2280 NVMe slots.
• Dual 5GbE Ethernet.
• HDMI.
• Btrfs and EXT4.
• TRAID/TRAID+ plus standard RAID layouts.

That is a lot of storage and network hardware in a four-bay enclosure.

TOS 7 Is Explicitly Container-First

TerraMaster’s current TOS 7 developer documentation describes the platform as moving to a container-first strategy.

TOS 7’s Container Manager is based on Docker Engine and supports:

• Image search and download.
• Container creation.
• Host and bridge networking.
• Persistent volumes.
• Docker Compose projects.
• Custom registries.
• Container terminals and logs.

For enthusiasts, this is a meaningful direction because it reduces dependence on a limited native NAS app catalogue. If an application publishes a good Docker image, it can often be deployed without waiting for a dedicated TerraMaster package.

TerraMaster’s Main Trade-Off Is Ecosystem Scale

TerraMaster now has credible storage, backup and container tooling, but the total first-party ecosystem and documentation footprint is smaller than Synology or QNAP.

That matters most if you want the NAS vendor to supply the complete workflow—photo management, backup, office tools, surveillance, remote administration and recovery—rather than treating Docker as the answer for many applications.

Four-Bay Hardware Example: How Different the Brands Are

These are not perfectly equivalent products, but current four-bay models illustrate each brand’s priorities.

Example	CPU	Base RAM	Networking	M.2	Platform emphasis
Synology DS925+	Ryzen V1500B	4GB ECC DDR4	2 × 2.5GbE	2	DSM storage/backup ecosystem
QNAP TS-464	Intel N5095	4GB or 8GB regional/config variant	2 × 2.5GbE	2	Expansion, Docker and VMs
UGREEN DXP4800 Plus	Intel 8505	8GB DDR5	2.5GbE + 10GbE	2	High hardware specification
TerraMaster F4-425 Plus	Intel N150	16GB DDR5	2 × 5GbE	3	Hardware value + container-first TOS

Do not interpret this table as a benchmark ranking. CPUs, memory types, storage software and workloads differ too much for the largest number in one column to determine the better NAS.

Docker: All Four Brands Are Viable

Docker used to be a differentiator between NAS brands. It is much less so now.

• Synology: Container Manager on compatible x86 systems.
• QNAP: Container Station with Docker/container support.
• UGREEN: Docker in UGOS Pro with graphical management and project workflows.
• TerraMaster: TOS 7 Container Manager with Docker Engine and Compose projects.

The more important questions are RAM, CPU, storage layout, network ports and how much you trust the NAS to be both storage appliance and application server.

Virtual Machines: Check the Exact Model

Do not assume that every NAS from a brand supports the same VM features.

Current examples:

• Synology DS925+ supports Virtual Machine Manager.
• QNAP TS-464 supports Virtualization Station.
• UGREEN current DXP models support Virtual Machine Manager.
• TerraMaster’s virtualisation capability varies by platform/application availability; Docker is the clearer common path under TOS 7.

If VMs are central to your plan, verify the exact CPU architecture, memory limit and VM package for the exact model before buying.

Plex and Jellyfin: CPU Architecture Matters More Than Brand

Media-server buyers often focus too heavily on NAS branding.

Hardware transcoding depends on:

• CPU/iGPU architecture.
• Codec support.
• Application support for that hardware.
• Container permissions.
• Software licensing where required.
• Whether transcoding is actually needed.

A powerful AMD-based NAS without suitable integrated media hardware can behave very differently from an Intel-based NAS with Quick Sync.

Use the dedicated guide for that workload: Best NAS for Plex and Jellyfin Hardware Transcoding.

Photos and Family Backups: Software Matters More

If the NAS is primarily replacing cloud photo storage and protecting family files, hardware specifications become less important than:

• Mobile photo backup reliability.
• Snapshot support.
• Versioning.
• Easy restore.
• Remote replication.
• External USB backup.
• Cloud backup integration.
• User/account management.

This is where Synology’s mature first-party application stack can outweigh faster network ports on another brand.

RAID Flexibility

All four brands support conventional RAID on appropriate multi-bay systems, but each adds its own storage-management approach.

• Synology: standard RAID plus SHR on supported models.
• QNAP: standard RAID with its own storage-pool and Qtier/snapshot ecosystem where supported.
• UGREEN: standard Basic/JBOD/RAID layouts depending on bay count.
• TerraMaster: standard RAID plus TRAID/TRAID+ on supported systems.

Flexible RAID systems such as SHR and TRAID can make mixed-capacity growth easier, but they do not remove the need for independent backups.

Networking: Do Not Pay for Ports You Cannot Use

UGREEN and TerraMaster currently offer very aggressive multi-gigabit networking on some models. QNAP also has a broad range of 2.5GbE and faster systems and can add faster adapters to models with suitable expansion. Synology’s current Plus desktop range has moved broadly to 2.5GbE.

But a 10GbE NAS connected to a 1GbE switch is still a 1GbE NAS from the client’s perspective.

Include switches, client NICs and cabling in the complete-system budget.

M.2 Slots: Cache, Storage Pool or Applications?

M.2 slot count looks easy to compare but vendor policies differ.

• Some systems allow general NVMe storage pools.
• Some emphasise cache.
• Some restrict which SSD models can create pools.
• PCIe lane bandwidth may be much lower than the SSD’s headline rating.

Buy NVMe only after deciding what you will use it for. Home Assistant backups and family file storage do not need an NVMe cache merely because the slots exist.

Drive Compatibility and Freedom

Drive policy is one of the areas where brand behaviour genuinely differs.

UGREEN and TerraMaster publish compatibility guidance but position third-party NAS drives as normal purchasing choices. QNAP also maintains broad compatibility lists for third-party storage.

Synology applies a more managed compatibility model. DSM 7.3 has made 2025 DS Plus SATA-drive use substantially more flexible, but M.2 pool/cache creation remains more tightly controlled.

Always verify the exact drive and firmware status before purchasing a full set of large HDDs or SSDs.

Do Not Ignore the Cost of the Drives

A four-bay NAS purchase can easily become a storage-drive purchase with a NAS attached.

Compare the complete system:

• NAS enclosure.
• Two/four/six matching NAS HDDs.
• RAM upgrades.
• M.2 SSDs.
• UPS.
• Faster Ethernet switch.
• Client NICs or USB adapters.
• External backup drive or second NAS.

A cheaper enclosure with four expensive drives may have almost the same total ownership cost as a more expensive enclosure. Do not make the brand decision from the diskless NAS price alone.

Which Brand for a Simple Backup NAS?

Synology is the most natural fit when your main goals are predictable storage administration, snapshots, family backups and a strong first-party recovery ecosystem.

QNAP, UGREEN and TerraMaster can all perform the same fundamental SMB/NFS backup role, but their extra hardware may go unused in a pure backup appliance.

Which Brand for Docker and Self-Hosting?

UGREEN and TerraMaster are especially attractive when hardware value and Docker are central, while QNAP offers an established server-style application and virtualisation ecosystem.

Synology also supports Docker/Container Manager on compatible x86 models, but you are less likely to choose it because it offers the most RAM, CPU or network bandwidth per pound/euro.

Which Brand for Virtual Machines?

QNAP and suitable UGREEN DXP systems make strong VM hosts when the exact model has enough RAM and CPU resources. Synology Virtual Machine Manager is also capable on supported Plus/XS systems.

If virtualisation is the main reason for the purchase, however, compare a mini PC plus NAS architecture as well. A separate Proxmox mini PC can provide much more compute flexibility while the NAS remains dedicated to storage.

Which Brand for a Four-Bay Family NAS?

Brand alone is not enough. At four bays, current model differences in CPU, iGPU, RAM, network speed and SSD slots are large enough that the exact model matters more than the company name.

Continue with Best 4-Bay NAS for Docker, Plex and Family Storage for the model shortlist.

A Practical Brand Decision Matrix

If your priority is…	Start with…	Why
Backup software and snapshots	Synology	Integrated DSM backup/storage stack
VMs and server-style flexibility	QNAP	Virtualization Station, Container Station, expansion options
High hardware specification for Docker	UGREEN	Strong RAM/network/CPU combinations on current NASync models
Hardware value plus Docker Compose	TerraMaster	TOS 7 container-first direction and competitive current hardware
Family photo/storage appliance	Synology first, then compare exact alternatives	First-party software can matter more than CPU speed
Media transcoding	Compare exact CPU/iGPU, not brand	Codec acceleration determines the workload

Synology vs QNAP vs UGREEN vs TerraMaster: The Bottom Line

Synology is the appliance-first choice. You are paying for DSM, storage management, backup tooling and a tightly integrated user experience more than maximum hardware specification.

QNAP is the traditional power-user choice. It gives you a broad server toolkit, containers, VMs, networking features and expansion options, but expects you to make more configuration decisions.

UGREEN is currently the hardware-value disruptor. Current NASync systems provide unusually strong CPU, RAM and networking combinations and have matured quickly on Docker and VM support, though UGOS Pro remains the newer ecosystem.

TerraMaster is increasingly compelling for enthusiasts. Current hardware is competitive and TOS 7’s container-first strategy makes the platform more attractive to users who prefer Docker-based self-hosting over a large proprietary app catalogue.

The best buying process is therefore: choose the workload, choose the required bay count, decide how much you value vendor software, then compare exact models and complete system cost.

Continue the NAS Buying Series

• Best NAS for Home Assistant Backups and Docker
• Best 4-Bay NAS for Docker, Plex and Family Storage
• Best NAS for Plex and Jellyfin Hardware Transcoding

Datasheets & External Resources

• Synology DS925+ – Official product and software specifications
• Synology – 2025+ drive compatibility policies under DSM 7.3
• Synology Container Manager
• QNAP TS-464 – Official hardware specifications
• QNAP TS-464 – Container Station and Virtualization Station specifications
• UGREEN DXP4800 Plus – Official specifications and Docker support
• TerraMaster F4-425 Plus – Official specifications
• TerraMaster TOS 7 Container Manager
• TerraMaster TOS 7 – Container-first architecture strategy