Winner
Updated September 2026
Data from Amazon and official Synology and Ubiquiti sites.
2026 verdict
Synology DS423 is the more complete option versus Ubiquiti UNAS 4 in 2026, helped most by price, rating, and processor.
It separates itself most clearly on price, rating, and processor, while still looking better on storage and network. Ubiquiti UNAS 4 is the better fit only for buyers who prioritize memory capacity above everything else here. Overall, Synology DS423 makes more sense for most people.
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| Feature | Synology DS423 | Ubiquiti UNAS 4 | Winner |
|---|---|---|---|
| Price | $399.99 | $504.99 | Synology DS423 |
| Rating | 4.4 | 4.1 | Synology DS423 |
| Processor | Hardware Encryption Engine | None | Synology DS423 |
| Memory Capacity | 2 GB | 4 GB | Ubiquiti UNAS 4 |
| Storage | Hot Swappable | None | Synology DS423 |
| Network | Wake on LAN | None | Synology DS423 |
| Apps & Virtualization | Plex Media Server, Surveillance App, AI Photo Recognition | None | Synology DS423 |
Winner
$399.99
- + Price: $399.99
- + Rating: 4.4
- + Processor: Hardware Encryption Engine
- - Memory Capacity: 2 GB vs 4 GB
$504.99
- + Memory Capacity: 4 GB
- - Price: $504.99 vs $399.99
- - Rating: 4.1 vs 4.4
Frequently Asked Questions
Which is better overall: Synology DS423 or Ubiquiti UNAS 4?
Synology DS423 has the stronger overall profile in this comparison, especially for price, rating, and processor.
What is the biggest difference between Synology DS423 and Ubiquiti UNAS 4?
Price is one of the clearest differences: Synology DS423 lists $399.99, while Ubiquiti UNAS 4 lists $504.99.
Which one looks better on price?
Synology DS423 is listed at $399.99, while Ubiquiti UNAS 4 is listed at $504.99. Synology DS423 (better spec).
Who should buy Synology DS423?
Choose Synology DS423 if your priority is price and rating and that matters more than memory capacity.
Who should buy Ubiquiti UNAS 4?
Choose Ubiquiti UNAS 4 if your priority is memory capacity and that matters more than price.
Full comparison table
Compare all 35 NAS side by side
You are looking at two of them. The full table lines up all NAS in the catalog with the same specs, so you can filter by what you need and sort by price or rating.
- 35 NAS
- 61 specs compared
- 58 filters
UbiquitiUNAS Pro
UbiquitiUNAS Pro 8
$912.70
UGREENNASync DXP6800 Ultra
$1449.99
SynologyDS223j
8% OFF$209.99$193.99
UGREENNASync DXP4800 Plus
10% OFF$729.99$656.99
SynologyDS223
16% OFF$304.99$254.99
SynologyDS225+
$364.99
SynologyDS425+
$589.44
UGREENNASync DXP6800 Pro
9% OFF$1209.99$1099.99
UGREENNASync DXP4800 GT
15% OFF$659.99$559.99
UGREENAI NAS iDX6011 Pro 64GB
$5999.99
UGREENNASync DXP2800
13% OFF$439.99$382.98
UGREENNASync DH2300
15% OFF$269.99$229.99
QNAPTS-464-8G-US
$639.00- Synology
DS423
$399.99 
UGREENNASync DXP4800 Pro
$799.99
SynologyDS1525+
$1278.93
UGREENNASync DXP2800 GT
10% OFF$509.99$459.99
UGREENNASync DXP8800 Ultra
$1779.99
SynologyDS124
$159.99
- NASSynology
DS124
4.3(212)$159.99 - NASSynology
DS1525+
4.4(100)$1278.93 
NASSynologyDS1823xs+
4.2(55)$2049.99
NASSynologyDS1825+
3.9(48)$1549.99- NASSynology
DS223
4.6(579)16% OFF$304.99$254.99 - NASSynology
DS223j
4.6(862)8% OFF$209.99$193.99 - NASSynology
DS225+
4.6(228)$364.99 
NASSynologyDS2422+
4.2(33)$1999.99
NASSynologyDS3622xs+
3.9(19)$3449.99- NASSynology
DS423
4.4(165)$399.99 - NASSynology
DS425+
4.6(98)$589.44 
NASSynologyDS725+
4.1(57)36% OFF$829.99$527.99
NASSynologyDS925+
4.2(156)17% OFF$889.99$742.62
NASUbiquitiEnterprise NAS
$3999.00
NASUbiquitiUNAS 2
1.0(1)8% OFF$269.99$248.20
NASUbiquitiUNAS 4
$504.99
NASUbiquitiUNAS Pro 4
$663.00- NASUbiquiti
UNAS Pro 8
5.0(1)$912.70 - NASUbiquiti
UNAS Pro
5.0(15) 
RoutersUbiquitiCloud Gateway Ultra
4.5(1,103)$136.00
RoutersUbiquitiUniFi Dream Router 5G Max
$644.99
RoutersUbiquitiUniFi Dream Router 7
4.5(281)$319.99
RoutersUbiquitiUniFi Express 7
4.6(109)$199.00