Synology Inc. (Chinese: 群暉科技; pinyin: Qúnhuī Kējì) is a Taiwanese corporation that specializes in network-attached storage (NAS) appliances. Synology's line of NAS is known as the DiskStation for desktop models, FlashStation for all-flash models, and RackStation for rack-mount models. Synology's products are distributed worldwide and localized in several languages.

Synology's headquarters are located in Taipei, Taiwan, with subsidiaries located around the world.

In 2018, product review website Wirecutter described Synology as a "longtime leader in the small-business and home NAS arena," albeit still a newcomer in the field of Wi-Fi routers.

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Synology Inc. was founded in 2000 after Cheen Liao [zh] and Philip Wong [zh] left Microsoft to pursue an independent project. Liao was a development manager in the Microsoft Exchange Server Group, while Wong was a Sales Director for Microsoft in Taiwan; at Microsoft, Wong is credited with contacting Cher Wang to propose licensing Windows CE to First International Computer; Wang would later found HTC. However, Wong felt that Taiwanese OEMs were doing most of the work for foreign brands, and left Microsoft.

At Synology, Liao and Wong wrote a new operating system called Filer OS based on Berkeley Software Distribution (BSD), which was to be used with Fastora NAS hardware to create a NAS solution. To integrate their NAS software tightly with hardware, Synology released its first complete solution in 2004, the DiskStation DS-101. Initially, Synology targeted the power user and small to medium sized business markets, as the high-end market for NAS solutions was dominated by EMC Corporation and NetApp.

Since then, Synology has grown to about 650 employees worldwide. Liao and Wong are still with the company, with Liao serving as President of Synology America Corp. and Wong serving Chairman of Synology Inc. By 2014, revenue exceeded NT$10 billion. In 2018, Wong stated that Synology's profits were "in the same neighborhood as ASUS", which were approximately NT$4.2 billion that year. The company moved its headquarters from Chang'an West Road and Chengde Road in Datong District, Taipei (near Taipei Main Station) to Banqiao District in 2019.

Synology uses an alphanumeric naming convention; the product name is two alphabetical characters followed by a three- or four-digit number. The alphabetical characters give the product category; the first (hundreds) digit is the number of internal drive bays, and the last two digits (tens and ones) is the year the product is intended to be sold. Sometimes, a suffix such as "+" (for increased performance) is applied. For example, the DS211+ is a DiskStation (NAS) with two drive bays, released in 2011, with enhanced performance. The "j" suffix is attached to entry-level products. This scheme was modified slightly after Synology released NAS expansion chassis (DX and RXnnn) so the first digit(s) (hundreds and/or thousands, if present) indicate the total number of drives supported. For example, the DS723+ has two internal bays, but can be connected to a five-drive expansion chassis, supporting a total of seven drives.

Consumer- and small/home business-oriented NAS products by Synology are sold under the DS (DiskStation) line, while larger businesses may choose the RS (RackStation) line of rack-mounted units; the corresponding expansion chassis include the DX (Disk eXpander) and RX (Rack eXpander), introduced in 2009. Synology also marketed a CS (CubeStation) line of four-bay storage products, with the approximate shape of a cube, but later folded these into the DS line.

In a review for SmallNetBuilder, Jim Buzbee was "impressed with the maturity of the DS-101's software and documentation" but felt the main negatives were "high cost and limited availability".

In addition, Synology sells FS/FX (FlashStation), HD (High Density), SA (Scalable Architecture), and UC (Uptime Critical) networked storage products for larger businesses, housed in rack-mountable units.

DiskStation Manager (DSM) is a Linux-based operating system developed by Synology for its NAS products.

Synology's software architecture allows for third-party add-on application integration. Hundreds of third-party applications are available in addition to Synology's own catalog. Command line access via SSH or Telnet is available. Access to development tools and APIs are also available on Synology's website. Third-party applications can be written in an interpreted programming language such as PHP or compiled to binary format. Public APIs allow custom applications to integrate into Synology's web-based user interface. Installers using the SPK format can install third-party applications directly on the DSM operating system.

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In 2014, a piece of ransomware emerged, dubbed "Synolocker," that targeted Synology NAS devices running DSM versions 4.0, 4.2, and 4.3. Synology fixed the vulnerabilities in November and December 2013.

Synology sells wireless routers (RT) and wireless mesh routers (MR, WRX). For these products, the numbers following the product class indicate the speed class and Wi-Fi technology; for example, RT1900ac is an 802.11ac router with 1900 Mbit/s maximum combined throughput. Synology router options are set either through a browser-accessible software interface called SRM (Synology Router Manager), similar in appearance to DSM, or a smartphone application named DS Router.

• List of companies of Taiwan

• Official website
• Synology's channel on YouTube

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