Looking for an honest Asustor Lockerstor 4 Gen 2 vs Synology DS1821+ comparison in 2026? We scored both nas storage on the same six-dimension framework — performance, battery, display, camera, design and value — using identical methodology, so the numbers below are directly comparable. Both products score nearly identically (52/100 vs 55/100) — this is a genuine toss-up that hinges on which specs matter most for your use case. The widest gap is in performance, where the Synology DS1821+ pulls noticeably ahead. On price the Asustor Lockerstor 4 Gen 2 undercuts the Synology DS1821+ by 60% ($499 vs $799), which materially changes the value calculus for budget-conscious buyers.
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Asustor Lockerstor 4 Gen 2 and Synology DS1821+ are closely matched nas storage devices with nearly identical overall scores (52 vs 55). The best choice depends on which specific features matter most to you.
✓ Pros
✗ Cons
✓ Pros
✗ Cons
| Spec | Asustor Lockerstor 4 Gen 2 | Synology DS1821+ |
|---|---|---|
| Price | 499$✓ | 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 |
Buy Asustor Lockerstor 4 Gen 2 if…
Choose the Asustor Lockerstor 4 Gen 2 if budget is your top priority — it offers competitive specs at a lower price point.
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 Lockerstor 4 Gen 2 and Synology DS1821+ are closely matched nas storage devices with nearly identical overall scores (52 vs 55). The best choice depends on which specific features matter most to you.
Both products score similarly — it depends on your priorities.
Asustor Lockerstor 4 Gen 2 is cheaper at $499 vs $799 for the Synology DS1821+.
Choose the Asustor Lockerstor 4 Gen 2 if budget is your top priority — it offers competitive specs at a lower price point.
The Synology DS1821+ is worth considering if you prefer its specific design, ecosystem, or brand — though it scores lower overall in our comparison.
Reviewed by VersusMatrix Editorial Team
Last updated: June 1, 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.
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.