Launched in 2023, NAB's Customer Brain is an artificial intelligence powered engine that helps the bank provide simple, tailored experiences efficiently for customers. Now, according to reporting at the Pega Innovate event in Sydney, the bank is preparing its biggest expansion yet.
NAB's Customer Brain guides more than 100 million interactions every month leveraging over 3,500 AI models across both the Personal and Business Bank. What began as an ambitious pilot has matured into a core operating system, with a 40% uplift in customer engagement when the Brain has nudged a customer about an action.
The scope is already impressive. NAB's Customer Brain guides more than 100 million interactions every month leveraging over 3,500 AI models across both the Personal and Business Bank. The system supports diverse use cases, from 2000 data points to understand what matters to each customer, then uses that insight to deliver the next best action, whether that's a helpful reminder, a timely nudge, or a moment of recognition.
Speaking at Pega Innovate Sydney, Lisa Marchant, executive for customer decisioning and data science (acting) at NAB, outlined the bank's next phase. According to iTnews, Marchant revealed that every month, the Brain helps guide more than 50 million interactions. More ambitiously, the system currently suggests "over 400 next best actions" to customers, but the bank intends to "get into the thousands."
To achieve this scale, NAB appears set to introduce new development approaches. The bank has begun using the Pega GenAI Blueprint platform, a cloud-based genAI tool for creating enterprise apps; described as "design-as-a-service." Blueprint will extract data, processes, and personas from application screens and video transcripts to build new applications in minutes.
This approach could allow NAB to modernise workflows currently embedded in legacy systems. The types of applications for the system range from supporting simple marketing campaigns and recognising debt repayment milestones to entire dispute resolution management workflows. By automating the process of rebuilding these workflows in modern conversational AI agents, the bank could deploy new customer-facing applications faster.
NAB's ambition mirrors broader industry trends. NAB's Chief Data & Analytics Officer Christian Nelissen said when technology is used to listen better, understand more, and anticipate a customer's needs, it improves how they feel about their experience. "Our ambition is to become the most client-centric company in Australia and New Zealand. NAB's Customer Brain is a key part of that strategy, helping us deliver simple, relevant and personalised experiences at scale," Mr Nelissen said.
The bank's emphasis, however, remains on balancing scale with customer value. According to Marchant, quoted at the Pega event, the system learns over time what customers like or dislike and adapts to their preferences, allowing the bank to stay relevant without overwhelming them. This balance between frequency and relevance will likely shape how NAB deploys its thousands of planned actions.
For Australian banks, the competitive pressure to innovate in customer experience continues to mount. By automating repetitive tasks and providing real-time insights, NAB enables its staff to focus on high-value problem solving and empathy-driven service. Success in this space increasingly depends on whether institutions can move faster without sacrificing trust. NAB's next expansion will test whether that balance is achievable at scale.