EXHIBIT 99 FORM 3 JOINT FILER INFORMATION Names of Joint Filers: Canaan VIII L.P. Canaan Partners VIII LLC Address of Joint Filers: c/o Canaan Partners 285 Riverside Avenue, Suite 250 Westport, CT 06880 Designated Filer: Canaan VIII L.P. Issuer and Ticker Symbol: Cardlytics, Inc. [CDLX] Date of Event: February 8, 2018 Signatures of Joint Filers: Canaan VIII L.P. By: Canaan Partners VIII LLC, its General Partner By: /s/ Janine MacDonald Attorney-in-Fact Canaan Partners VIII LLC By: /s/ Janine MacDonald Attorney-in-Fact ACTIVE/94225454.2