Asustor Drivestor 4 Pro vs Synology DS1821+
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AI Matrix
Powered by Claude AIAsustor Drivestor 4 Pro narrowly beats the Synology DS1821+ in the nas storage category, especially in value ($399 vs $799), scoring 54 vs 47. If you want the better overall nas storage, Asustor Drivestor 4 Pro is the recommended choice.
3 Reasons Why Asustor Drivestor 4 Pro Is Better
- 1.Lower price: $399 vs $799
- 2.Better value score: 82 vs 52
- 3.Higher overall score: 54 vs 47
What are you giving up?
Picking Asustor Drivestor 4 Pro over Synology DS1821+ means trading these off.
You give up
Nothing meaningful — Asustor Drivestor 4 Pro matches or beats Synology DS1821+ on every measured spec.
You gain
- +$400 cheaper ($399 vs $799)
Spec Comparison
Asustor Drivestor 4 ProSynology DS1821+
Score Breakdown
Asustor Drivestor 4 ProSynology DS1821+
35
Drive Bays25% weight
35Tie
82
Price20% weight
52Asustor Drivestor 4 Pro Winner
3
RAM20% weight
3Tie
99
Power Usage15% weight
99Tie
94
Noise10% weight
92Tie
35
Warranty10% weight
35Tie
Scores are relative within the nas storagecategory. Percentages show each dimension's weight in the overall score. A difference of less than 0.5 points is considered a tie.
Asustor Drivestor 4 Pro
Winner✓ Pros
- ●Lower price: $399 vs $799
- ●Better value for money
Synology DS1821+
✗ Cons
- ●Higher price: $799 vs $399
- ●Higher price relative to value
Spec Comparison
| Spec | Asustor Drivestor 4 ProW | Synology DS1821+ |
|---|---|---|
| Price | 399$✓ | 799$ |
| RAM | 4GB | 4GB |
| OS | ADM 4.0 | DSM 7.2 |
| Weight | 1100g | 1100g |
| Dimensions | 200 x 180 x 220 mm | 260 x 193 x 166 mm |
| Colors | Black | Black |
Who Should Buy
Buy Asustor Drivestor 4 Pro if…
Buy the Asustor Drivestor 4 Pro if you want the best overall value in this comparison. It scores higher overall and is the recommended choice for most buyers.
Buy Synology DS1821+ if…
The Synology DS1821+ is worth considering if you prefer its specific design, ecosystem, or brand — though it scores lower overall in our comparison.
Asustor Drivestor 4 Pro vs Synology DS1821+ — FAQ
Asustor Drivestor 4 Pro vs Synology DS1821+: which is better?
Asustor Drivestor 4 Pro narrowly beats the Synology DS1821+ in the nas storage category, especially in value ($399 vs $799), scoring 54 vs 47. If you want the better overall nas storage, Asustor Drivestor 4 Pro is the recommended choice.
Is Asustor Drivestor 4 Pro better than Synology DS1821+?
Yes, Asustor Drivestor 4 Pro scores higher overall (43 vs 60).
Which is cheaper, Asustor Drivestor 4 Pro or Synology DS1821+?
Asustor Drivestor 4 Pro is cheaper at $399 vs $799 for the Synology DS1821+.
Who should buy the Asustor Drivestor 4 Pro?
Buy the Asustor Drivestor 4 Pro if you want the best overall value in this comparison. It scores higher overall and is the recommended choice for most buyers.
Who should buy the Synology DS1821+?
The Synology DS1821+ is worth considering if you prefer its specific design, ecosystem, or brand — though it scores lower overall in our comparison.
Related Comparisons
Full Asustor Drivestor 4 Pro review →Full Synology DS1821+ review →All Asustor NAS Storage →All Synology NAS Storage →
Reviewed by VersusMatrix Editorial Team
Last updated: April 25, 2026
Methodology: AI-powered analysis of technical specifications from manufacturer data. Scores are calculated by comparing products across multiple dimensions and normalized relative to the full category database. Our editorial process is independent and not influenced by affiliate partnerships.