Outcome
This companion comparison post compares Synology 1621+ Network Attached Storage (NAS) to the top live alternatives found on April 10, 2026, including current Amazon and Alibaba checks.
Source Device
The Synology DS1621+ is a compact 6-bay NAS featuring an AMD Ryzen V1500B quad-core processor, 4GB DDR4 ECC memory (expandable), dual M.2 NVMe cache slots, and 4x 1GbE networking. It's designed for centralized storage, backups, and integrates with Home Assistant via the Synology DSM integration. It is a local-first NAS with optional cloud backups.
Top Alternatives
- TS-673A: The QNAP TS-673A is a direct competitor to the Synology DS1621+ as a 6-bay NAS solution. It features a similar AMD Ryzen processor, supports ECC memory, M.2 NVMe SSD caching, and offers 2.5GbE networking with PCIe expansion for 10GbE, providing comparable performance and expandability for home labs and small offices.
- DiskStation DS1821+: The Synology DS1821+ is an excellent alternative for users seeking more storage capacity and similar features within the familiar Synology ecosystem. It offers 8 bays (expandable to 18), the same AMD Ryzen processor, ECC memory support, and NVMe cache slots as the DS1621+, making it a logical upgrade path for increased data needs.
- TrueNAS Mini X+: The TrueNAS Mini X+ offers a powerful, open-source alternative for users who prioritize advanced data integrity (ZFS), virtualization capabilities, and greater control over their NAS operating system. With 7 drive bays (5x 3.5" + 2x 2.5"), an 8-core Intel Atom CPU, ECC memory, and dual 10GbE networking, it provides a robust platform for demanding home lab or small business environments, often appealing to users comfortable with a more hands-on approach.
Comparison Matrix
| Category | Synology 1621+ Network Attached Storage (NAS) | TS-673A | DiskStation DS1821+ | TrueNAS Mini X+ |
|---|---|---|---|---|
| Features | Source device | ★★★★☆ | ★★★★★ | ★★★★★ |
| Interoperability | Source device | ★★★★☆ | ★★★★★ | ★★★★☆ |
| Setup Ease | Source device | ★★★★☆ | ★★★★★ | ★★★☆☆ |
| Cloud Dependency | Source device | ★★★★★ | ★★★★★ | ★★★★★ |
| Vendor Trust | Source device | ★★★★☆ | ★★★★★ | ★★★★☆ |
| Overall | Source device | ★★★★☆ | ★★★★★ | ★★★★☆ |
Pricing And Availability
| Device | Amazon Price | Alibaba Price |
|---|---|---|
| TS-673A | $799.99 | Price not found |
| DiskStation DS1821+ | Price not found | Price not found |
| TrueNAS Mini X+ | Price not found | Price not found |
Operator Notes
- Pricing and availability for NAS devices can fluctuate rapidly. The provided prices and availability reflect information found during the search on April 10, 2026.
- For Alibaba, direct pricing and clear availability for specific diskless NAS models are often not readily available without direct inquiry to suppliers or navigating complex B2B platforms. Therefore, 'Price not found' and 'Availability not explicitly stated for direct purchase' are used where applicable.
Source URLs
TS-673A | Official: https://www.qnap.com/en/product/ts-673a
TS-673A | Home Assistant: https://www.home-assistant.io/integrations/qnap/
TS-673A | Amazon: https://www.newegg.com/qnap-ts-673a-8g-us/p/N82E16822099105
TS-673A | Alibaba: https://www.aliexpress.com/item/1005005822971541.html
DiskStation DS1821+ | Official: https://www.synology.com/en-us/products/DS1821+
DiskStation DS1821+ | Home Assistant: https://www.home-assistant.io/integrations/synology_dsm/
DiskStation DS1821+ | Amazon: N/A
DiskStation DS1821+ | Alibaba: https://www.aliexpress.com/item/1005004928370803.html
TrueNAS Mini X+ | Official: https://www.truenas.com/truenas-mini/
TrueNAS Mini X+ | Home Assistant: https://github.com/tomaae/homeassistant-truenas
TrueNAS Mini X+ | Amazon: N/A
TrueNAS Mini X+ | Alibaba: N/A