AGREEMENT TO FILE JOINTLY AND STATEMENT APPOINTING DESIGNATED FILER AND
AUTHORIZED SIGNATORY

              Each of the undersigned entities and individuals (collectively,
the "Reporting Persons") hereby authorizes and designates Meritech Capital
Associates V L.L.C. or such other person or entity as is designated in writing
by Paul Madera (the "Designated Filer") as the beneficial owner to prepare and
file on behalf of such Reporting Person individually, or jointly together with
the other Reporting Persons, any and all reports, notices, communications and
other documents (including, but not limited to, reports on Schedule 13D,
Schedule 13G, Schedule 13H, Form 13-F, Form 3, Form 4 and Form 5) that such
Reporting Person may be required to file with the United States Securities and
Exchange Commission pursuant to the Securities Act of 1933, as amended (together
with the implementing regulations thereto, the "Act") and the Securities
Exchange Act of 1934, as amended (together with the implementing regulations
thereto, the "Exchange Act") (collectively, the "Reports") with respect to each
Reporting Person's ownership of, or transactions in, securities of any entity
whose securities are beneficially owned (directly or indirectly) by such
Reporting Person (collectively, the "Companies").

              Each Reporting Person hereby further authorizes and designates
Joel Backman (the "Authorized Signatory") to execute and file on behalf of such
Reporting Person the Reports and to perform any and all other acts, which in the
opinion of the Designated Filer or Authorized Signatory may be necessary or
incidental to the performance of the foregoing powers herein granted.

              The authority of the Designated Filer and the Authorized Signatory
under this Document with respect to each Reporting Person shall continue until
such Reporting Person is no longer required to file any Reports with respect to
the Reporting Person's ownership of, or transactions in, the securities of the
Companies, unless earlier revoked in writing.  Each Reporting Person
acknowledges that the Designated Filer and the Authorized Signatory are not
assuming any of the Reporting Person's responsibilities to comply with the Act
or the Exchange Act.

March 22, 2017	MERITECH CAPITAL ASSOCIATES V L.L.C.,
			a Delaware Limited Liability Company

			By:	/s/ Paul Madera
				Paul Madera, Managing Member



March 22, 2017	MERITECH CAPITAL PARTNERS V L.P.,
		a Delaware Limited Partnership

		By:	MERITECH CAPITAL ASSOCIATES V L.L.C.,
			a Delaware Limited Liability Company
			Its General Partner

		By:	/s/ Paul Madera
			Paul Madera, Managing Member



March 22, 2017	MERITECH CAPITAL AFFILIATES V L.P.,
		a Delaware Limited Partnership

		By:	MERITECH CAPITAL ASSOCIATES V L.L.C.,
			a Delaware Limited Liability Company
			Its General Partner

		By:	/s/ Paul Madera
			Paul Madera, Managing Member


March 22, 2017	MERITECH SUB-MANAGEMENT CORPORATION
		a Delaware company

		By:	/s/ Paul Madera
			Paul Madera, Director



March 22, 2017	By:	/s/ Paul Madera
			Paul Madera


March 22, 2017	By:	/s/ Mike Gordon
			Mike Gordon


March 22, 2017	By:	/s/ George Bischof
			George Bischof


March 22, 2017	By:	/s/ Rob Ward
			Rob Ward


March 22, 2017	By:	/s/ Craig Sherman
			Craig Sherman