Lecture 7: Fintech Business Models

Neobanks, embedded finance, BNPL, Open Banking, Big Tech in finance

Prof. Dr. Andre Guettler
Prof. Dr. Andre Guettler Director of the Institute
Helmholtzstraße 22, Room 205
andre.guettler@uni-ulm.de
+49 731 50 31 030
Oliver Padmaperuma
Oliver Padmaperuma Doctoral Candidate
Helmholtzstraße 22, Room 203
oliver.padmaperuma@uni-ulm.de
+49 731 50 31 036

7.1 Course objectives

  • 7.1 Course objectives
  • 7.2 Recap from Lecture 6
  • 7.3 Neobanks
  • 7.4 Embedded finance & BaaS
  • 7.5 BNPL
  • 7.6 Open Banking & PSD2
  • 7.7 Big Tech in finance
  • 7.8 Conclusion of Lecture 7
  • Welcome to
  • Course Objective
  • Course at a glance (1/3)
  • Course at a glance (2/3)
  • Course at a glance (3/3)
  • Assignments / Exams

Welcome to Emerging Technology & Finance

  • This is a flipped-classroom Bachelor course: every regular lecture (odd weeks) is followed by a flipped session (even weeks) where all groups present on the same topic. There is no exam to register for — sign up on the course Moodle page by 15 October 2026 so you receive announcements and the token-allocation quiz links.
  • Form a group of 4 by the end of Week 1 (Moodle sign-up sheet). Stragglers will be allocated by the lecturers.
  • Grading is 100% cumulative across the 6 flipped sessions: each session = 50% peer-allocated tokens + 50% lecturer evaluation. Each group gets 20 fresh tokens every flipped week to allocate to other groups via a Moodle quiz within 5 minutes of the session ending.
  • Submission per session: upload your slide PDF to Moodle before each flipped session starts. Ask questions during or right after each session — that is the preferred channel.
  • Admin / studies / exam-eligibility questions go to the registrar’s office (Studiensekretariat) at studiensekretariat@uni-ulm.de.
  • Course-content questions outside class: email oliver.padmaperuma@uni-ulm.de, CC andre.guettler@uni-ulm.de.
  • We also recommend the student advisory service.

Course Objective

Scope

We will:

  • Survey six emerging-technology modules at the cutting edge of finance: agentic AI · blockchain & DeFi · fintech business models · RegTech & cybersecurity · CBDCs
  • Pair every regular lecture with a flipped session in which every group presents their angle on the topic
  • Train critical evaluation, presentation, and peer-judgment skills via a transparent token-based peer-grading mechanic
  • Place the technologies in a real-world business and regulatory context (PSD2/3, MiCA, EU AI Act, post-quantum standards)

We will NOT:

  • Build production-grade fintech systems or trade live capital
  • Cover deep technical implementations (we treat code as supplement, not core)
  • Run a separate written exam or final-pitch competition — the cumulative flipped-session grade is the entire grade

Approach

Flipped-classroom alternation (12 weeks)

  • Odd weeks (W1, W3, W5, W7, W9, W11): regular lecture introducing the topic
  • Even weeks (W2, W4, W6, W8, W10, W12): flipped session — all groups present and allocate tokens
  • Groups of 4, formed by end of Week 1

Token mechanic (the grading vehicle)

  • 20 tokens per group per flipped session
  • Each group allocates them to other groups, weighing insight · originality · clarity · critical depth
  • Cumulative across 6 sessions = 50% of final grade · lecturer evaluation = 50%

Course at a glance (1/3)

Foundations of Digital Disruption in Financial Services

Week 1

22.10.2026

What is ‘emerging tech in finance’, how did we get here, where is it going

  • Three waves of digital disruption in finance
  • Today’s actors: incumbents, challengers, Big Tech, infrastructure
  • Regulatory backdrop: PSD2, MiCA, EU AI Act
  • Why now: structural drivers
  • What this course will cover

Flipped — Digital Disruption in Financial Services

Week 2

29.10.2026

Group presentations · token allocation · discussion

  • Recap of the foundations lecture
  • Group presentations on digital disruption
  • Token allocation & next steps

Agentic AI & LLMs in Finance

Week 3

05.11.2026

From LLMs to agents · applications · failure modes · EU AI Act

  • LLMs in finance: architecture, training, capabilities
  • Agentic AI: from answers to actions
  • Applications: RAG, robo-advisors, AML, trading agents
  • Failure modes: hallucination, drift, prompt injection
  • Governance: EU AI Act and high-risk obligations

Flipped — Agentic AI & LLMs in Finance

Week 4

12.11.2026

Group presentations · token allocation · discussion

  • Recap of the agentic AI lecture
  • Group presentations on real LLM and agent deployments
  • Token allocation & next steps

Blockchain, Crypto, DeFi & Tokenisation

Week 5

19.11.2026

From distributed ledgers to MiCA-regulated markets

  • Blockchain primer: ledgers, consensus, smart contracts
  • Crypto markets: BTC, ETH, stablecoins
  • DeFi primitives: AMMs, lending, derivatives
  • Tokenisation of real-world assets
  • MiCA framework and EU enforcement

Course at a glance (2/3)

Flipped — Blockchain, Crypto, DeFi & Tokenisation

Week 6

26.11.2026

Group presentations · token allocation · discussion

  • Recap of the blockchain & DeFi lecture
  • Group presentations on real protocols and deployments
  • Token allocation & next steps

Fintech Business Models

Week 7

03.12.2026

Neobanks, embedded finance, BNPL, Open Banking, Big Tech in finance

  • Neobanks: N26, Revolut, Monzo, Chime
  • Embedded finance & BaaS
  • BNPL: Klarna, Affirm, regulatory pushback
  • Open Banking & PSD2 outcomes
  • Big Tech in finance

Flipped — Fintech Business Models

Week 8

10.12.2026

Neobanks, embedded finance, BNPL · group presentations · token allocation

  • Recap of the fintech business-models lecture
  • Group presentations on real companies and unit economics
  • Token allocation & next steps

RegTech, Cybersecurity & Privacy-Preserving Compute

Week 9

17.12.2026

Industrialising compliance · cyber-threat landscape · ZKPs, MPC, federated learning · post-quantum

  • RegTech overview: industrialising compliance
  • KYC/AML automation in production
  • Cybersecurity threats in finance
  • Privacy-preserving compute: ZKPs, MPC, federated learning
  • Post-quantum cryptography & the migration

Flipped — RegTech, Cybersecurity & Privacy-Preserving Compute

Week 10

07.01.2027

Group presentations · token allocation · discussion

  • Recap of the RegTech & security lecture
  • Group presentations on vendors, incidents, and emerging tech
  • Token allocation & next steps

Course at a glance (3/3)

CBDCs & the Future of Money

Week 11

14.01.2027

Wholesale vs retail design · Digital Euro · e-CNY · programmable money

  • What’s a CBDC: wholesale vs retail
  • The Digital Euro state of play
  • China’s e-CNY and small-country implementations
  • Programmable money: feature, threat, or both
  • Stablecoins as private money: tension with CBDCs

Flipped — CBDCs & the Future of Money

Week 12

21.01.2027

Final session · group presentations · token allocation · course wrap-up

  • Recap of the CBDCs lecture
  • Group presentations on real CBDC projects
  • Token allocation, final standings, and course retrospective

Assignments / Exams

Six in-class group presentations across six emerging-tech topics, graded cumulatively. Each session: 50% peer-allocated tokens + 50% lecturer evaluation.

Group of up to 4.

Submit by emailing oliver.padmaperuma@uni-ulm.de, CC andre.guettler@uni-ulm.de. Subject pattern: Emerging Technology & Finance_assignment-1-flipped-classroom-presentations_surname1_surname2_…

21 January 2027

7.2 Recap from Lecture 6

  • 7.1 Course objectives
  • 7.2 Recap from Lecture 6
  • 7.3 Neobanks
  • 7.4 Embedded finance & BaaS
  • 7.5 BNPL
  • 7.6 Open Banking & PSD2
  • 7.7 Big Tech in finance
  • 7.8 Conclusion of Lecture 7
  • What the flipped session surfaced

What the flipped session surfaced

  • DeFi protocols that survived the “TVL is not revenue” critique — usually Uniswap, MakerDAO, Aave — vs the over-leveraged also-rans.
  • The most credible RWA tokenisation case the room found — almost certainly tokenised T-bills (BUIDL, OUSG, BENJI).
  • A pattern across DeFi hacks: 80%+ are smart-contract logic bugs, not cryptographic failures.

7.3 Neobanks

  • 7.1 Course objectives
  • 7.2 Recap from Lecture 6
  • 7.3 Neobanks
  • 7.4 Embedded finance & BaaS
  • 7.5 BNPL
  • 7.6 Open Banking & PSD2
  • 7.7 Big Tech in finance
  • 7.8 Conclusion of Lecture 7
  • The neobank business model
  • Unit economics, simplified

The neobank business model

  • Customer acquisition — app-store + paid social + referrals; CAC €15–40 vs incumbents’ €100–300.
  • Revenue — interchange (the big one, 0.2–1.4% per card transaction depending on region) · premium subscriptions · FX margins · interest on deposits parked at the central bank · gradually lending.
  • Path to profitability — most neobanks took 7–10 years to operating profit; Revolut announced first full-year profit in 2024, N26 announced first quarterly profit in 2024.
  • Geographic reality — easier in EU than US (passportable banking licence vs partner-bank dependency).

Unit economics, simplified

Metric Neobank Incumbent bank
Customer acquisition cost (CAC) €15–40 €100–300 (branch, advisor time)
Revenue per user (annual) €30–80 €200–400
Cost-to-income ratio 50–70% (improving with scale) 50–60% (stable)
Time to operating profit 7–10 years n/a (legacy positive)
Premium-subscription share of revenue 20–40% (rising) <5%
  • Neobanks win on CAC — the digital-native acquisition model is structurally cheaper.
  • Neobanks lose on revenue per user — narrower product range, customer-deposit balances 1/10 of incumbents’.
  • Cross-over depends on premium subscriptions (Revolut Plus/Metal/Ultra) and lending (most neobanks barely lend).
  • Lending is the structural bottleneck: neobanks haven’t built the credit-underwriting capability to deploy their deposits profitably.

7.4 Embedded finance & BaaS

  • 7.1 Course objectives
  • 7.2 Recap from Lecture 6
  • 7.3 Neobanks
  • 7.4 Embedded finance & BaaS
  • 7.5 BNPL
  • 7.6 Open Banking & PSD2
  • 7.7 Big Tech in finance
  • 7.8 Conclusion of Lecture 7
  • What means
  • The BaaS stack

What “embedded” means

  • Financial primitives (accounts, payments, lending, cards) exposed as APIs to non-finance companies.
  • A SaaS firm offers a payment account; a retailer offers BNPL at checkout; a gig platform offers instant pay-out — without becoming a bank.
  • The bank that powers the experience is typically invisible to the end user.
  • A consumer who uses “Uber Cash” or “Shopify Balance” is interacting with an embedded financial product whose legal counterparty they may not recognise.

The BaaS stack

  • Stripe — payments + treasury + issuing; expanding into lending and capital products.
  • Marqeta — card issuing infrastructure; powers Klarna, DoorDash, JPMorgan Chase wallets.
  • Solaris, Treezor, Treasury Prime — accounts + cards in Europe.
  • Adyen — payments at scale; eBay, Uber, Spotify under the hood.
  • Gig platforms (Uber, DoorDash) for instant pay-out.
  • SaaS firms (Shopify Pay, Square) for merchant accounts.
  • Retailers (Amazon, IKEA) for store cards and BNPL.
  • Other fintechs that don’t want their own banking licence.

7.5 BNPL

  • 7.1 Course objectives
  • 7.2 Recap from Lecture 6
  • 7.3 Neobanks
  • 7.4 Embedded finance & BaaS
  • 7.5 BNPL
  • 7.6 Open Banking & PSD2
  • 7.7 Big Tech in finance
  • 7.8 Conclusion of Lecture 7
  • What BNPL actually does
  • Regulatory recharacterisation

What BNPL actually does

  • Splits an online checkout into 4 (or 6, or 12) instalments, typically interest-free for the consumer.
  • Provider pays the merchant immediately; collects from consumer over weeks or months.
  • Provider revenue: merchant take-rate (4–6% of transaction value — more than card interchange) + late fees (varies by market).
  • Provider risk: consumer default, chargebacks, and increasingly regulatory recharacterisation as credit.

Regulatory recharacterisation

  • UK — FCA brought BNPL under credit regulation (in force 2026). Affordability checks required.
  • EU — Consumer Credit Directive II (CCD2) covers BNPL; phased application across member states 2025–27.
  • US — CFPB rule reclassifying BNPL as credit-card-equivalent (contested in court).
  • Australia — BNPL Code of Conduct + new credit-licence regime.

The honest critique of BNPL: it disclosed less than equivalent credit, was usable by under-banked consumers without affordability checks, and contributed to over-indebtedness in some segments. Regulators caught up.

7.6 Open Banking & PSD2

  • 7.1 Course objectives
  • 7.2 Recap from Lecture 6
  • 7.3 Neobanks
  • 7.4 Embedded finance & BaaS
  • 7.5 BNPL
  • 7.6 Open Banking & PSD2
  • 7.7 Big Tech in finance
  • 7.8 Conclusion of Lecture 7
  • What PSD2 actually mandated
  • Did PSD2 deliver competition?

What PSD2 actually mandated

  • Banks must expose customer-authorised account data via APIs to licensed third parties — AIS (Account Information Services).
  • Banks must allow licensed third parties to initiate payments on behalf of customers — PIS (Payment Initiation Services).
  • Strong Customer Authentication (SCA) required for online transactions over €30.
  • Goal: catalyse competition by breaking banks’ data monopoly over customer-account information (European Parliament and Council 2015).

Did PSD2 deliver competition?

  • TrueLayer, Tink (now Visa), Plaid (US analogue) built thriving aggregator businesses.
  • BaaS aggregators monetise PSD2 primitives at scale.
  • Mortgage and lending workflows in the UK improved dramatically via Open Banking-powered income verification.
  • The B2B Open-Banking infrastructure layer is the clearest commercial win.
  • Most consumers don’t directly use PIS for retail payments (cards remain dominant).
  • Some bank-controlled APIs degrade competitor experience subtly.
  • The biggest consumer-facing improvement (mortgage onboarding) is hidden from end users.
  • “Open Banking” the consumer term and PSD2 the legal text are not the same thing.

7.7 Big Tech in finance

  • 7.1 Course objectives
  • 7.2 Recap from Lecture 6
  • 7.3 Neobanks
  • 7.4 Embedded finance & BaaS
  • 7.5 BNPL
  • 7.6 Open Banking & PSD2
  • 7.7 Big Tech in finance
  • 7.8 Conclusion of Lecture 7
  • The defensive moat thesis
  • The land-grab thesis

The defensive moat thesis

  • Western Big Tech offers payments not to disrupt banking but to lock users into the ecosystem.
  • Apple Pay → keeps users on iPhone (high switching cost).
  • Google Pay → ad-targeting data + Android ecosystem stickiness.
  • Amazon Lending → seller stickiness on Amazon marketplace.
  • The financial product is rarely profitable on its own; it’s a retention tool for the core product.

The land-grab thesis

  • Alibaba’s Ant Group — became China’s largest financial-services firm (before 2020–21 regulatory intervention).
  • WeChat Pay — primary payment rail for a billion users.
  • M-Pesa — primary financial-services rail in Kenya, run by mobile-network operator Safaricom.
  • These are offensive plays — finance is the core business, not a feature (Jack and Suri 2014).

7.8 Conclusion of Lecture 7

  • 7.1 Course objectives
  • 7.2 Recap from Lecture 6
  • 7.3 Neobanks
  • 7.4 Embedded finance & BaaS
  • 7.5 BNPL
  • 7.6 Open Banking & PSD2
  • 7.7 Big Tech in finance
  • 7.8 Conclusion of Lecture 7
  • Course at a glance (1/3)
  • Course at a glance (2/3)
  • Course at a glance (3/3)
  • Further reading
  • Prepare before next flipped session (Week 8)
  • See you next time
  • References

Course at a glance (1/3)

Foundations of Digital Disruption in Financial Services

Week 1

22.10.2026

What is ‘emerging tech in finance’, how did we get here, where is it going

  • Three waves of digital disruption in finance
  • Today’s actors: incumbents, challengers, Big Tech, infrastructure
  • Regulatory backdrop: PSD2, MiCA, EU AI Act
  • Why now: structural drivers
  • What this course will cover

Flipped — Digital Disruption in Financial Services

Week 2

29.10.2026

Group presentations · token allocation · discussion

  • Recap of the foundations lecture
  • Group presentations on digital disruption
  • Token allocation & next steps

Agentic AI & LLMs in Finance

Week 3

05.11.2026

From LLMs to agents · applications · failure modes · EU AI Act

  • LLMs in finance: architecture, training, capabilities
  • Agentic AI: from answers to actions
  • Applications: RAG, robo-advisors, AML, trading agents
  • Failure modes: hallucination, drift, prompt injection
  • Governance: EU AI Act and high-risk obligations

Flipped — Agentic AI & LLMs in Finance

Week 4

12.11.2026

Group presentations · token allocation · discussion

  • Recap of the agentic AI lecture
  • Group presentations on real LLM and agent deployments
  • Token allocation & next steps

Blockchain, Crypto, DeFi & Tokenisation

Week 5

19.11.2026

From distributed ledgers to MiCA-regulated markets

  • Blockchain primer: ledgers, consensus, smart contracts
  • Crypto markets: BTC, ETH, stablecoins
  • DeFi primitives: AMMs, lending, derivatives
  • Tokenisation of real-world assets
  • MiCA framework and EU enforcement

Course at a glance (2/3)

Flipped — Blockchain, Crypto, DeFi & Tokenisation

Week 6

26.11.2026

Group presentations · token allocation · discussion

  • Recap of the blockchain & DeFi lecture
  • Group presentations on real protocols and deployments
  • Token allocation & next steps

Fintech Business Models

Week 7

03.12.2026

Neobanks, embedded finance, BNPL, Open Banking, Big Tech in finance

  • Neobanks: N26, Revolut, Monzo, Chime
  • Embedded finance & BaaS
  • BNPL: Klarna, Affirm, regulatory pushback
  • Open Banking & PSD2 outcomes
  • Big Tech in finance

Flipped — Fintech Business Models

Week 8

10.12.2026

Neobanks, embedded finance, BNPL · group presentations · token allocation

  • Recap of the fintech business-models lecture
  • Group presentations on real companies and unit economics
  • Token allocation & next steps

RegTech, Cybersecurity & Privacy-Preserving Compute

Week 9

17.12.2026

Industrialising compliance · cyber-threat landscape · ZKPs, MPC, federated learning · post-quantum

  • RegTech overview: industrialising compliance
  • KYC/AML automation in production
  • Cybersecurity threats in finance
  • Privacy-preserving compute: ZKPs, MPC, federated learning
  • Post-quantum cryptography & the migration

Flipped — RegTech, Cybersecurity & Privacy-Preserving Compute

Week 10

07.01.2027

Group presentations · token allocation · discussion

  • Recap of the RegTech & security lecture
  • Group presentations on vendors, incidents, and emerging tech
  • Token allocation & next steps

Course at a glance (3/3)

CBDCs & the Future of Money

Week 11

14.01.2027

Wholesale vs retail design · Digital Euro · e-CNY · programmable money

  • What’s a CBDC: wholesale vs retail
  • The Digital Euro state of play
  • China’s e-CNY and small-country implementations
  • Programmable money: feature, threat, or both
  • Stablecoins as private money: tension with CBDCs

Flipped — CBDCs & the Future of Money

Week 12

21.01.2027

Final session · group presentations · token allocation · course wrap-up

  • Recap of the CBDCs lecture
  • Group presentations on real CBDC projects
  • Token allocation, final standings, and course retrospective

Further reading

  • Vives (2017) — concise 12-page framing on FinTech vs banking.
  • Frost et al. (2019) — BIS WP on Big Tech in financial intermediation.
  • Berg, Fuster, and Puri (2022) — Annual Review chapter on FinTech lending.
  • European Parliament and Council (2015) — PSD2 text; focus on AIS / PIS / SCA definitions.

Prepare before next flipped session (Week 8)

  1. Pick your Week-8 angle from the presentation series brief.
  2. Bring real unit-economics — CAC, LTV, take-rate, default rate, net-interest margin. Numbers, not vendor narrative.
  3. Pick a counterargument to your thesis — peers will probe it in Q&A. Anticipating one beats answering one cold.
  4. Upload slide PDF to Moodle before 14:00 next Thursday.

See you next time

Reminder

  • Next session: Lecture 8 — Flipped: Fintech Business Models on 10 December 2026.
  • Each group presents (6 min + 2 min Q&A).
  • Slides due on Moodle before 14:00.

References

Berg, Tobias, Andreas Fuster, and Manju Puri. 2022. FinTech Lending.” Annual Review of Financial Economics 14: 187–207. https://doi.org/10.1146/annurev-financial-101521-112042.
European Parliament and Council. 2015. “Directive (EU) 2015/2366 on Payment Services in the Internal Market (PSD2).” Official Journal of the European Union, L 337/35. https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:32015L2366.
Frost, Jon, Leonardo Gambacorta, Yi Huang, Hyun Song Shin, and Pablo Zbinden. 2019. BigTech and the Changing Structure of Financial Intermediation.” BIS Working Paper 779. Bank for International Settlements. https://www.bis.org/publ/work779.htm.
Jack, William, and Tavneet Suri. 2014. “Risk Sharing and Transactions Costs: Evidence from Kenya’s Mobile Money Revolution.” American Economic Review 104 (1): 183–223. https://doi.org/10.1257/aer.104.1.183.
Vives, Xavier. 2017. “The Impact of FinTech on Banking.” European Economy: Banks, Regulation, and the Real Sector, no. 2: 97–105.