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Ds1821 Synology Comparison - September 2025
| 1 Best Choice  9.8Exceptional | 2  9.7Exceptional | 3 Best Value  9.6Exceptional | 4  9.3Excellent | 5  9.2Excellent | 6  9.1Excellent |
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ModelSynology DS1821+ 8-Bay Diskstation NAS (AMD Ryzen V1500B Quad-Core 2,2 GHz 4 GB DDR4 ECC SODIMM 4 x 1 GbE RJ-45 LAN-Port) 32TB Bundle with 8X 4TB Seagate IronWolf | Model Synology 8 Bay RackStation RS1221+ (Diskless) | Model Synology 8-Bay DiskStation DS1823xs+ (Diskless) | Model Synology DiskStation 12 Bay DS2422+ Quad Core CPU with 4GB Memory (Diskless) | Model Synology DiskStation DS1821+ NAS Server for Business with Ryzen CPU, 32GB Memory, 32TB HDD, DSM Operating System, iSCSI Target Ready | Model OWC 32GB (2X16GB) DDR4 RAM Compatible with Synology DiskStation DS1819+ and DS1821+ NAS System 2666MHz PC4-21300 CL19 ECC Unbuffered SODIMM 2Rx8 1.2V Memory Upgrade |
BrandSynology | Brand Synology | Brand Synology | Brand Synology | Brand Synology | Brand OWC |
Reviews | Reviews | Reviews | Reviews  | Reviews - | Reviews |
Tech Specs | |||||
item weight26.5 pounds | item weight 20.6 pounds | item weight 16.42 pounds | item weight 20.9 pounds | item weight - | item weight 1.76 ounces |
customer reviews4.7 4.7 out of 5 stars 186 ratings 4.7 out of 5 stars | customer reviews 4.5 4.5 out of 5 stars 114 ratings 4.5 out of 5 stars | customer reviews 4.0 4.0 out of 5 stars 32 ratings 4.0 out of 5 stars | customer reviews 3.1 3.1 out of 5 stars 17 ratings 3.1 out of 5 stars | customer reviews - | customer reviews 4.2 4.2 out of 5 stars 8 ratings 4.2 out of 5 stars |
product dimensions13.5 x 9.6 x 6.5 inches | product dimensions 23 x 16.5 x 8.5 inches | product dimensions 18.11 x 14.57 x 12.6 inches | product dimensions 18.5 x 17 x 16.5 inches | product dimensions - | product dimensions - |
item dimensions lxwxh- | item dimensions lxwxh 23 x 16.5 x 8.5 inches | item dimensions lxwxh 18.11 x 14.57 x 12.6 inches | item dimensions lxwxh 18.5 x 17 x 16.5 inches | item dimensions lxwxh - | item dimensions lxwxh - |
ram- | ram - | ram - | ram 4 GB | ram 32 GB DDR4 | ram 32 GB DDR4 |
Available On | Available On   | Available On | Available On | Available On | Available On |
Our Top 3 Picks
Here are the top 3 recommended products with more information to help you find the right product for you
9.8
1SynologySynology DS1821+ 8-Bay Diskstation NAS (AMD Ryzen V1500B Quad-Core 2,2 GHz 4 GB DDR4 ECC SODIMM 4 x 1 GbE RJ-45 LAN-Port) 32TB Bundle with 8X 4TB Seagate IronWolf
Why we love it
Large Capacity: 8 bay storage.
High Performance: AMD Ryzen CPU.
Flexible: Expandable storage.
Main highlights- Sophisticated software: The DS1821+ comes with a wide range of software applications, including file sharing, backup, virtualization, and multimedia streaming.
- Expandable storage: The DS1821+ can be expanded up to 18 bays by connecting two DX517 expansion units.
- Dual M.2 NVMe slots: The DS1821+ has two M.2 NVMe slots, which can be used to add SSD cache for improved performance.
- AMD Ryzen CPU: The DS1821+ is powered by an AMD Ryzen quad-core processor, which provides excellent performance for a variety of tasks, including file sharing, virtualization, and multimedia streaming.
- 8-bay NAS: The Synology DS1821+ is an 8-bay NAS, which means it can accommodate up to 8 hard drives or SSDs. This makes it a great option for businesses or individuals who need a lot of storage space.
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9.7
2Synology
Synology 8 Bay RackStation RS1221+ (Diskless)
Why we love it
The RS1221 and RS1221RP can easily handle multiple users with up to 2,315 MB/s read and 1,147 MB/s write performance.
They are short depth at just 298 mm and 399 mm respectively.
You can improve network performance by 5X with a PCIe SFP or RJ 45 network card from the compatibility list.
Main highlights- The RS1221+ and RS1221RP+ feature a short depth of just 298 mm and 399 mm respectively
- Tackle multi-user environments effortlessly with up to 2,315 MB/s read and 1,147 MB/s write performance
- Improve network performance by 5X with a PCIe SFP+ or RJ-45 network card from the compatibility list
- Configure two units together to create a Synology High Availability (SHA) cluster for maximum service uptime and minute-level failover
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9.6
3Synology
Synology 8-Bay DiskStation DS1823xs+ (Diskless)
Why we love it
Easily expandable storage options.
Comprehensive data protection features.
Highly reliable with great support.
Main highlights- Protect your IT infrastructure with license free solutions for backup, replication, and recovery
- Maximize uptime with hot-swappable drives, online volume expansion, and Synology High Availability clustering
- Check the product specification page for the software or application you want to use
- Check Synology knowledge center or YouTube channel for help on product setup and additional information
- Attach up to 2 Synology DX517 Expansion Units for up to 18 drive bays
Our ranking system
At BestChoice.com, our team curates a selection of top products from a vast array available online, using a sophisticated ranking system based on carefully defined criteria.While traditional hands-on testing has its merits, our use of AI technology offers distinct advantages. AI allows us to process and analyze vast amounts of data from multiple sources, providing a comprehensive view that goes beyond what manual testing can achieve. This approach enables us to deliver insights that are aligned with current trends and consumer preferences, ensuring our reviews are both relevant and up-to-date.
Features
Our AI-driven analysis examines key attributes, capabilities, and other critical factors tailored to each product category. This method allows us to assess effectiveness from various perspectives, ensuring a well-rounded evaluation.
Consumer Reviews
We aggregate and evaluate consumer feedback from across the internet, giving weight to ratings and reviews that reflect the most reliable insights. AI enhances this process by filtering and prioritizing data, offering a balanced view without the need for direct personal endorsements.
Popularity
Our system also considers the popularity of products, analyzing factors such as market presence, reputation, and user satisfaction. By leveraging AI, we capture a comprehensive picture of a product's standing in the market, which may not always be evident through traditional testing.
Value for money
AI allows us to compare products based on attributes like price, specifications, and user feedback, helping to determine their value for money. This data-driven approach offers an efficient and reliable way to assess how products stack up against one another in terms of cost-effectiveness.
