Outcome
This companion comparison post compares Synology DS1621+ NAS to the top live alternatives found on April 10, 2026, including current Amazon and Alibaba checks.
Source Device
The Synology DS1621+ is a 6-bay network-attached storage system designed for power users, small businesses, and advanced home labs. It features an AMD Ryzen quad-core processor, 4GB ECC RAM (expandable to 32GB), and offers enterprise-grade data management with consumer-friendly interfaces. Its comprehensive DSM operating system provides applications for file sharing, virtualization, Docker containers for home automation, surveillance recording, media streaming (Plex), and backup solutions. It also integrates with Home Assistant for monitoring and notifications.
Top Alternatives
- TS-673A-8G-US: The QNAP TS-673A is a direct competitor to the Synology DS1621+ due to its similar 6-bay configuration and AMD Ryzen V1500B quad-core processor, offering comparable performance for virtualization, Docker, and demanding home lab environments. It also features dual 2.5GbE ports and PCIe expansion for 10GbE, matching the DS1621+'s upgradeability.
- Lockerstor 6 Gen2 (AS6706T): The Asustor Lockerstor 6 Gen2 (AS6706T) is a strong alternative, offering a 6-bay design with a powerful Intel Celeron N5105 quad-core processor. Its dual 2.5GbE ports and four M.2 NVMe slots provide excellent performance and flexibility for caching or storage, making it suitable for demanding tasks like direct video editing and virtualization, similar to the Synology DS1621+.
- F6-424: The TerraMaster F6-424 is a cost-effective 6-bay NAS that offers a compelling alternative with its newer Intel Celeron N95 processor, 8GB DDR5 RAM, dual 2.5GbE ports, and M.2 NVMe slots for SSD caching. It's well-suited for home labs and small to medium businesses requiring high-performance storage and virtualization capabilities.
Comparison Matrix
| Category | Synology DS1621+ NAS | TS-673A-8G-US | Lockerstor 6 Gen2 (AS6706T) | F6-424 |
|---|---|---|---|---|
| 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-8G-US | $799.99 | Unavailable |
| Lockerstor 6 Gen2 (AS6706T) | $831.87 | ₹85000 (approx $1020 USD) |
| F6-424 | $593.00 | Unavailable |
Operator Notes
- The Synology DS1621+ is a well-regarded NAS, but its alternatives from QNAP, Asustor, and TerraMaster offer competitive features, especially in terms of processor power, faster networking, and M.2 SSD capabilities.
- Pricing and availability for NAS devices can fluctuate, and it's always recommended to check multiple retailers for the most current information.
- Home Assistant integration for these alternatives is primarily achieved through Docker or Virtual Machine Manager, which are well-supported features on these x86-based NAS devices.
Source URLs
TS-673A-8G-US | Official: https://www.qnap.com/en/product/ts-673a
TS-673A-8G-US | Home Assistant: https://www.home-assistant.io/integrations/qnap/
TS-673A-8G-US | Amazon: https://www.newegg.com/qnap-ts-673a-8g-us/p/N82E16822079010
TS-673A-8G-US | Alibaba: Unavailable
Lockerstor 6 Gen2 (AS6706T) | Official: https://www.asustor.com/en/product/LOCKERSTOR_6_Gen2
Lockerstor 6 Gen2 (AS6706T) | Home Assistant: https://www.asustor.com/en/app_central/app_detail/home_assistant
Lockerstor 6 Gen2 (AS6706T) | Amazon: https://www.tech-america.com/asustor-lockerstor-6-gen2-as6706t-6-bay-nas-quad-core-2-0-ghz-cpu-4x-m-2-nvme-slots-dual-2-5gbe-upgradable-to-10gbe-8gb-ddr4-ram-content-creation/
Lockerstor 6 Gen2 (AS6706T) | Alibaba: https://www.indiamart.com/proddetail/asustor-lockerstor-6-gen2-as6706t-network-attached-storage-2854117830662.html
F6-424 | Official: https://www.terra-master.com/global/products/f6-424.html
F6-424 | Home Assistant: https://www.terra-master.com/global/press/terramaster-tos-5-supports-docker-and-virtualbox/
F6-424 | Amazon: https://www.aliexpress.com/item/1005006450893072.html
F6-424 | Alibaba: Unavailable