Espressif Systems (Shanghai) Co., Ltd. (Espressif; Chinese: 乐鑫科技; pinyin: Lèxīn Kējì) is a publicly listed Chinese semiconductor company headquartered in Shanghai. It focuses on developing and selling wireless microcontroller unit communication chips and modules that are used in internet of things (IoT).

In 2008, Espressif was founded in China by Singaporean national, Teo Swee Ann. Teo who graduated from National University of Singapore with degrees in electrical engineering had worked for Montage Technology as an engineering director.

Espressif initially started as one-man consulting firm which later expanded. However due to the small quantity of chips commissioned by Espressif, foundries tended to reject it. However, TSMC, who had heard of Teo's work at Montage Technology, gave Espressif a chance and became its supplier.

On 22 July 2019, Espressif had its initial public offering and became a listed company on the Shanghai Stock Exchange STAR Market. The offering raised 1.2 billion yuan.

In March 2022, it was reported that Espressif was moving exclusively to the RISC-V open source instruction set architecture.

As of September 2023, Espressif has shipped over 1 billion IoT chips and is the fifth largest company in the Wi-Fi microcontrollers business.

Since establishment, Espressif has remained profitable. Rather than buying existing solutions which is a common practice in the chip industry, Espressif performs its own engineering and has a very cost effective method of designing chips. Managers and directors are expected to do coding in addition to their managerial duties.

Espressif's sales model is comprised primarily of direct sales, supplemented by distribution.