Zyxel Communications Corporation (/ˈzaɪsɛl/ ZY-sel; Chinese: 合勤科技; pinyin: Héqín Kējì),^[1] a subsidiary of Zyxel Group Corporation, is a Taiwanese multinational broadband provider headquartered in the Hsinchu Science Park, Taiwan. The company was founded in 1989 by Shun-I Chu, and has three research centers, four regional headquarters, and 35 branch offices.

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The company has a portfolio of mobile and fixed-line broadband access products. In 2020, Zyxel Communications launched WiFi 6 and 5G products.

• 1988 – Zyxel founder, Dr. Shun-I Chu, starts the business in Taoyuan County, Taiwan in 1988. Dr. Chu rents an apartment in Taoyuan as a lab and starts to develop an analog modem in 1988
• 1989 – Headquarters established at Hsinchu Science Park, Taiwan in 1989
• 1992 – Launches world's 1st Integrated voice/fax/modem
• 1995 – World's 1st Analog/digital ISDN modem
• 2004 – World's 1st ADSL2+ gateway
• 2005 – World's 1st palm-sized portable personal firewall
• 2009 – World's 1st Gigabit active fiber & Telco-grade IPv6 end to end solution
• 2010 – World's 1st Carbon footprint verification on the VDSL2 CPE product
• 2014 – World's 1st UMTS 802.11ac compatible small cell CPE
• 2016 – Garners 14th Consecutive Best Taiwan Global Brands Award^[2]
• 2019 – Zyxel Networks spun off from Zyxel Communications Corp.^[3]

• List of companies of Taiwan
• List of networking hardware vendors
• ZyNOS, an operating system used for Zyxel networking devices