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Be fundamentally different, not incrementally better | Jag Duggal (Nubank, Facebook, Google)

Jag Duggal is chief product officer at Nubank, a decacorn neobank founded in Brazil. It’s valued at over $30 billion, is bigger than Coinbase, Robinhood, Affirm, and SoFi combined, has 100 million customers (more than Bank of America!) while only operating in three countries in Latin America, and 80% to 90% of its growth comes through word of mouth. Prior to Nubank, Jag was a director of product management at Facebook, a senior vice president at Quantcast, and a product leader at Google. In our conversation, we discuss: • How Nubank builds a fanatical user base • Tactics for driving word-of-mouth growth • Measuring customer love through the Sean Ellis score • The importance of strategic clarity • The role of category design in creating successful products • Why companies should strive to be “fundamentally different,” not “incrementally better” • Nubank’s vision for an AI-powered banking future — Brought to you by: • WorkOS—Modern identity platform for B2B SaaS, free up to 1 million MAUs: https://workos.com/lenny • Mercury—The powerful and intuitive way for ambitious companies to bank: https://mercury.com/ • OneSchema—Import CSV data 10x faster: https://oneschema.co/lenny Find the transcript and references at: https://www.lennysnewsletter.com/p/be-fundamentally-different-jag-duggal Where to find Jag Duggal: • LinkedIn: https://www.linkedin.com/in/jagduggal/ Where to find Lenny: • Newsletter: https://www.lennysnewsletter.com • X: https://twitter.com/lennysan • LinkedIn: https://www.linkedin.com/in/lennyrachitsky/ In this episode, we cover: (00:00) Jag’s background (04:34) Nubank’s remarkable achievements (06:01) Nubank’s product development process (11:23) Nubank’s values (12:16) Building products people love fanatically (15:21) The Sean Ellis score (21:27) An example project using the Sean Ellis score (25:07) Picking up the phone and calling customers (28:20) The importance of starting small and iterating (30:42) Pushing back effectively (34:10) Uncovering pain points through customer research (37:53) An example of setting a clear hypothesis (43:11) Developing a strategy (52:16) “Be fundamentally different, not incrementally better” (53:10) Category design (57:37) Nubank’s founding story and goals for the future (01:00:46) Advice for adding new product lines (01:03:46) The future of fintech and banking (01:09:23) AI corner (01:12:34) Failure corner (01:20:24) Key takeaways (01:22:11) Lightning round Production and marketing by https://penname.co/. For inquiries about sponsoring the podcast, email podcast@lennyrachitsky.com. Lenny may be an investor in the companies discussed.

Lenny RachitskyhostJag Duggalguest
May 15, 20241h 35mWatch on YouTube ↗

At a glance

WHAT IT’S REALLY ABOUT

Nubank’s Fanatical Customers: Building Fundamentally Different Financial Products Worldwide

  1. Jag Duggal, CPO of Nubank, explains how Nubank became a massive, word-of-mouth-driven fintech by obsessively building products customers love “fanatically,” anchored in deep pain points and a clear, focused strategy. He details how Nubank operationalizes product love through cultural values, rigorous product‑market‑fit gates like the Sean Ellis score, and extremely high NPS expectations before scaling new lines. The conversation dives into strategy craft, category design, and how to be fundamentally different rather than incrementally better, while also unpacking Nubank’s expansion into dozens of product lines and new geographies. Jag closes by outlining a future where banking becomes AI-native, social, and “self-driving,” effectively putting a personal banker in everyone’s pocket.

IDEAS WORTH REMEMBERING

5 ideas

Anchor products in deep, emotionally charged pain points.

Nubank succeeded by attacking the intense frustration with Brazil’s fee-heavy, widely hated incumbent banks, offering a no-fee, digital, branchless credit card that felt fundamentally different, not just cheaper.

Build culture that demands customers ‘love you fanatically.’

Nubank’s first core value is that customers should love them fanatically; this value is pervasive, used in reviews and decisions, and creates a bias toward long-term customer delight over short-term convenience or revenue.

Use high product-market-fit thresholds before scaling anything.

They rarely scale a product until it passes an elevated Sean Ellis score (50% “very disappointed” in Brazil) plus strong NPS and low churn, preventing them from “scaling small problems into big messes.”

Combine quant data with direct, scrappy customer contact.

Teams don’t just survey thousands of users; PMs and designers personally call ~10 customers, use anecdotes to interpret data, analyze bullseye segments with high love scores, and then iterate specifically for those use cases.

Strategy must be specific, coherent, and focused—not vague ambition.

Following thinkers like Richard Rumelt and Roger Martin, Jag defines strategy as a clear, concentrated plan to apply unique strengths to a well-defined problem; clarity matters more than being perfectly right because it reveals when you’re off course.

WORDS WORTH SAVING

5 quotes

We’re not trying to be incrementally better. We are trying to be fundamentally different.

— Jag Duggal

We want our customers to love us fanatically.

— Jag Duggal

Good enough isn’t good enough. Is it great enough?

— Jag Duggal (quoting Nubank’s lead designer)

We are not going to take a small problem and scale it, because if we do that, we end up with a big mess.

— Jag Duggal

We may not be right, but at least we are clear.

— Kevin Systrom (quoted by Jag Duggal)

Nubank’s growth engine and culture of fanatical customer loveOperationalizing product-market fit (Sean Ellis score, NPS, churn) before scalingCustomer discovery, user research, and hypothesis-driven product developmentStrategy development: focus, clarity, and being fundamentally differentCategory design vs. competing in existing categoriesLaunching and sequencing multiple new product lines and marketsThe future of fintech and AI-native, “self-driving” banking experiences

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