Exhibit 99.3

Designated Filer:	Insight Holdings Group, LLC
Issuer & Ticker Symbol:	Alteryx, Inc. [AYX]
Date of Event Requiring Statement:	August 16, 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

INSIGHT VENTURE ASSOCIATES COINVESTMENT III, LTD.

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

1

Designated Filer:	Insight Holdings Group, LLC
Issuer & Ticker Symbol:	Alteryx, Inc. [AYX]
Date of Event Requiring Statement:	August 16, 2018

INSIGHT HOLDINGS GROUP, LLC
By:	/s/ Blair Flicker
Name: Blair Flicker
Title: Authorized Signatory

2