science

Klarna

Klarna is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Klarna rather than just read about it. In short: Klarna Group plc is a Swedish financial technology company and digital bank. Founded in 2005 in Stockholm, Sweden, Klarna provides digital payments, short-term consumer credit, cards, banking services and merchant tools for online and in-store commerce.

Key takeaways

Klarna belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Klarna to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Klarna from memory before moving on to harder problems.

Reference excerpt

Klarna Group plc is a Swedish financial technology company and digital bank. Founded in 2005 in Stockholm, Sweden, Klarna provides digital payments, short-term consumer credit, cards, banking services and merchant tools for online and in-store commerce. It is listed on the New York Stock Exchange and is best known for buy now, pay later payment products. Klarna Bank AB, the group's Swedish banking subsidiary, is authorized as a bank and supervised by the Swedish Financial Supervisory Authority. It provides financial services in the European Economic Area under European Union banking rules as well as areas outside the EEA, including in the United States and the United Kingdom, through local subsidiaries. As of 2026, Klarna reported more than 119 million active consumers, more than one million merchants, 3.4 million transactions per day and operations across 26 countries.

History

Founding and early years Klarna was founded in 2005 by Sebastian Siemiatkowski, Niklas Adalberth and Victor Jacobsson after the founders developed an idea for simplifying online payments. The company was initially known as Kreditor and was supported by SSE Business Lab, the Stockholm School of Economics' start-up incubator. The early business idea centered around allowing consumers to receive goods before paying by taking on the role of credit and fraud risk for merchants. Angel investor Jane Walerud became an early backer of the company, offering the founders SEK 600,000 for 10% of the company after seeing the idea presented and later connecting them with developers who helped build the platform. Erlang programming language was utilized in Klarna's early technical architecture, a point associated with Walerud's background at Erlang Systems. In 2007, Investment AB Öresund invested in the company. Klarna subsequently expanded outside Sweden, first to Norway, Finland and Denmark, and later to Germany and the Netherlands. In 2009, the company changed the Kreditor name to Klarna.

Expansion, acquisitions and banking license In 2010, Sequoia Capital invested in Klarna. In 2011, Klarna was listed by The Daily Telegraph among Europe's promising young technology companies. In May 2011, Klarna acquired Analyzd, an Israeli company specializing in online payments, risk management and fraud prevention. Later that year, General Atlantic led a $155 million investment round, joined by DST Global, to accelerate international expansion. Klarna Checkout was launched in 2012 as an embedded checkout product for online merchants. By 2024, the product had a 40% market share in Sweden and over 20% across the Nordic region before the company sold the business that same year. In 2013, Klarna acquired German online payments company SOFORT AG, operator of Sofortüberweisung, forming Klarna Group. Klarna launched in the United States in 2015, which became one of the company's main growth markets. In the same year, Sweden's then Minister for Enterprise and Innovation, Mikael Damberg, described Klarna as one of Sweden's five "unicorn" technology companies, alongside Spotify, Mojang, Skype and King. In June 2017, Klarna received a full banking license from the Swedish Financial Supervisory Authority. In 2018, the company acquired Close Brothers Retail Finance in the United Kingdom, strengthening its UK retail finance position. In 2019, Klarna raised $460 million in a funding round that valued the company at $5.5 billion, making it one of Europe's highest valued financial technology companies at the time. In 2020, Ant Financial, the financial affiliate of Alibaba Group, acquired a minority stake in Klarna as part of a partnership with the Swedish company.

… excerpt ends here. Continue reading the full article.

Illustrations

Worked examples

Example 1 — a first encounter with Klarna

Start with the simplest possible case. Write down what Klarna claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Klarna before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Klarna ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Klarna

In research: Klarna appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Klarna in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Klarna is common in secondary-school and first-year university syllabi. It links to neighbouring topics 2005 establishments in Sweden, Banks of Sweden, Companies based in Stockholm, so understanding it makes those chapters shorter.
In everyday life: Look for Klarna outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Klarna in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Klarna means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Klarna out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Klarna in simple terms?

Why does Klarna matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Klarna?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Klarna.