EXHIBIT 99.1

AGREEMENT

Pursuant to Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree that only one statement containing the information required by Schedule 13G need be filed with respect to the ownership by each of the undersigned of the shares of Common Stock of Roku, Inc.

Date:	February 12, 2018
MENLO VENTURES X, L.P.
By:	MV Management X, L.L.C., its general partner
	By:	/s/ Mark A. Siegel
		Mark A. Siegel
		Managing Member
MENLO ENTREPRENEURS FUND X, L.P
By:	MV Management X, L.L.C., its general partner
	By:	/s/ Mark A. Siegel
		Mark A. Siegel
		Managing Member
MMEF X, L.P
By:	MV Management X, L.L.C., its general partner
	By:	/s/ Mark A. Siegel
		Mark A. Siegel
		Managing Member
MV MANAGEMENT X, L.L.C.
	By:	/s/ Mark A. Siegel
		Mark A. Siegel
		Managing Member
/s/ Henry D. Montgomery
Henry D. Montgomery
/s/ John W. Jarve
John W. Jarve
/s/ Douglas C. Carlisle
Douglas C. Carlisle
/s/ Mark A. Siegel
Mark A. Siegel
/s/ Shawn T. Carolan
Shawn T. Carolan