Exhibit 99.3

Designated Filer:	Insight Holdings Group, LLC
Issuer & Ticker Symbol:	Alteryx, Inc. [AYX]
Date of Event Requiring Statement:	August 30, 2018

JOINT FILERS’ SIGNATURES

INSIGHT VENTURE PARTNERS VIII, L.P.
By:	Insight Venture Associates VIII, L.P., its general partner
By:	Insight Venture Associates VIII, Ltd., its general partner
By:	/s/ Blair Flicker
Name: Blair Flicker
Title: Authorized Signatory
INSIGHT VENTURE PARTNERS (CAYMAN) VIII, L.P.
By:	Insight Venture Associates VIII, L.P., its general partner
By:	Insight Venture Associates VIII, Ltd., its general partner
By:	/s/ Blair Flicker
Name: Blair Flicker
Title: Authorized Signatory
INSIGHT VENTURE PARTNERS (DELAWARE) VIII, L.P.
By:	Insight Venture Associates VIII, L.P., its general partner
By:	Insight Venture Associates VIII, Ltd., its general partner
By:	/s/ Blair Flicker
Name: Blair Flicker
Title: Authorized Signatory

1

INSIGHT VENTURE PARTNERS VIII (CO-INVESTORS), L.P.
By:	Insight Venture Associates VIII, L.P., its general partner
By:	Insight Venture Associates VIII, Ltd., its general partner
By:	/s/ Blair Flicker
Name: Blair Flicker
Title: Authorized Signatory
INSIGHT VENTURE ASSOCIATES VIII, L.P.
By:	Insight Venture Associates VIII, Ltd., its general partner
By:	/s/ Blair Flicker
Name: Blair Flicker
Title: Authorized Signatory
INSIGHT VENTURE ASSOCIATES VIII, 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