Exhibit 2.1

JOINT FILING AGREEMENT

The undersigned hereby agree to the joint filing on behalf of each of them of a statement on Schedule 13D with respect to the Class A Ordinary Shares of Sogou Inc., and any further amendments to such statement on Schedule 13D executed by each of them, pursuant to and in accordance with the provisions of Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended.

IN WITNESS WHEREOF, this Joint Filing Agreement has been executed by the undersigned as of October 9, 2020.

Sohu.com Limited
By:	/s/ Joanna Lv
	Name: Joanna Lv
	Title: Chief Financial Officer
Sohu.com (Search) Limited
By:	/s/ Xiufeng Deng
	Name: Xiufeng Deng
	Title: Sole Director