When the acquisition deal is completed next month, Westpac plans to integrate MoneyBrilliant's technology into its digital banking app.
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Westpac said updating the app is in response to a growing number of consumers and businesses choosing to bank digitally.
Eftpos' enhanced security features, which include two-factor authentication, have been initially adopted by local merchants Till Payments, Fat Zebra, and Eftex.
CBA will use its relationship with H2O.ai to improve fraud detection and natural disaster predictions, and help customers make better credit decisions.