Exhibit 99.3

Designated Filer:	Insight Holdings Group, LLC
Issuer & Ticker Symbol:	Alteryx, Inc. [AYX]
Date of Event Requiring Statement:	September 6, 2018

JOINT FILERS’ SIGNATURES

INSIGHT VENTURE PARTNERS COINVESTMENT FUND III, L.P.

By: Insight Venture Associates Coinvestment III, L.P., its general partner
By: Insight Venture Associates Coinvestment III, Ltd., its general partner

By:	/s/ Blair Flicker
Name: Blair Flicker
Title: Authorized Signatory


INSIGHT VENTURE PARTNERS COINVESTMENT FUND (DELAWARE) III, L.P.

By: Insight Venture Associates Coinvestment III, L.P., its general partner
By: Insight Venture Associates Coinvestment III, Ltd., its general partner

By:	/s/ Blair Flicker
Name: Blair Flicker
Title: Authorized Signatory


INSIGHT VENTURE ASSOCIATES COINVESTMENT III, L.P.

By: Insight Venture Associates Coinvestment III, Ltd., its general partner


By:	/s/ Blair Flicker
Name: Blair Flicker
Title: Authorized Signatory

1

INSIGHT VENTURE ASSOCIATES COINVESTMENT III, LTD.


By:	/s/ Blair Flicker
Name: Blair Flicker
Title: Authorized Signatory


INSIGHT HOLDINGS GROUP, LLC


By:	/s/ Blair Flicker
Name: Blair Flicker
Title: Authorized Signatory

2

Insight Venture Associates Coinvestment III, Ltd. 4