ABOUT
About Lech Kaniuk
I keep building.
Lech Kaniuk is a Swedish-Polish entrepreneur and the Founder and CEO of Kepta, an AI-native legal-services company. He builds companies around fundamental shifts: food delivery moving online, urban mobility going digital, homes becoming energy producers, and now legal work rebuilt around AI. He is the author of three books and an investor. He has founded over 10 companies across food, mobility, energy and now legal. His work centres on building companies, raising capital, and helping founders understand the consequences of both.
Today his focus is Kepta, a technology company delivering legal work to businesses through an AI-native production system. He is building it from Warsaw and Stockholm.
Siła Pędu follows the founder journey from Warsaw to Sweden in 1985, through early attempts to earn money, medical studies in Łódź, the move to Luleå, first companies, PizzaPortal, Delivery Hero, expansion, M&A, and the lessons that followed.
The opening places that story at a contract table: a Montblanc pen, a 100 million euro investment agreement, the earlier 120 million złoty sale to Delivery Hero, and a company later valued above 5 billion euro.
Anioł w Piekle examines fundraising from both sides of the table. Its Polish preface describes capital raised from business angels, funds, public sources, partners, suppliers, and customers, ranging from 23.4 thousand złoty to 100 million euro.
The third book, The Two Numbers That Build or Break Every Business, is an operating system for the two numbers that decide whether a business compounds or dies: customer lifetime value (LTV) and acquisition cost (CAC).
The same questions connect the books: how to start before everything is certain, how to create momentum, and how outside capital changes the company a founder is building.
Key moments
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1985
Moved with family from Warsaw to Sweden, as told in Siła Pędu.
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Łódź
Returned to Poland for medical studies; the car was stolen, the apartment was burgled, and the plan collapsed.
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Luleå
Called the Space Engineering professor, drove north, slept in the car, and registered for studies.
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KYAB
First serious company lessons: selling, running out of money, and changing the model after meeting a real customer.
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PizzaPortal
Built through expansion and M&A; Siła Pędu cites the Delivery Hero sale and later group value.
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SunRoof
Anioł w Piekle describes the family-investment exception and the decision to enter the project gradually.
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2018
Published Siła Pędu, the founder story and operating idea behind momentum.
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2021
Published Anioł w Piekle, a practical examination of investor money from both sides of the table.
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2025
English editions of both books: Power of Momentum and Angel in Hell.
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2026
Published The Two Numbers That Build or Break Every Business, on lifetime value and acquisition cost.
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Now
Founder and CEO of Kepta. Also supervisory board chairman at SunRoof, building FaradayX, and Venture Partner at Eleven Ventures since January 2026.
The facts
Last updated 2026-10-11
- Born
- Warsaw, Poland. Moved to Sweden with his family in 1985. Source: Power of Momentum, ch. 1
- Nationality
- Swedish–Polish. Source: 2026 bio
- Languages
- Polish, English, Swedish. Source: 2026 bio
- What he does
- Founder and CEO of Kepta. Builds companies around fundamental shifts: food delivery online, urban mobility, home energy, and now legal work delivered with AI. Has founded over 10 companies. Source: 2026 bio
- PizzaPortal / OnlinePizza
- Co-founder, 2009–2016. Sold to Delivery Hero for PLN 120 million; the group was worth more than €5 billion three years later. Source: Power of Momentum, word from the author
- iTaxi
- Angel investor 2014, CEO 2016–2018. Profitable today. Source: his third book + 2026 bio
- SunRoof
- CEO 2018–2024, building-integrated solar. Supervisory board chairman since December 2025. Source: Angel in Hell, ch. 2 + 2026 bio
- FaradayX
- Founder, since June 2025. Energy-as-a-Service: ultra-light solar and storage. Source: 2026 bio
- Kepta
- Founder and CEO, since 2026. A technology company delivering legal work to businesses through an AI-native production system, built from Warsaw and Stockholm. kepta.legal Source: 2026 bio
- Investing
- More than 40 angel investments. Venture Partner at Eleven Ventures since January 2026, backing founders across CEE. Source: Angel in Hell + 2026 bio
- Books
- Three: Siła Pędu (2018; English edition Power of Momentum, 2025), Anioł w Piekle (2021; English edition Angel in Hell, 2025), and The Two Numbers That Build or Break Every Business (2026), on lifetime value and acquisition cost. Source: published 2018–2026
- Teaching
- MBA lecturer at SGH Warsaw School of Economics and Kozminski University; keynote speaker. Source: 2026 bio
Track record
The big numbers are from the books, where they’re told in full, dips included.
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2009–2016
PizzaPortal / OnlinePizza , Co-founder
Sold to Delivery Hero for PLN 120M; later a €100M round; group value passed €5B, as told in his books.
Power of Momentum, word from the author
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2016–2018
iTaxi , Angel (2014), then CEO (2016)
Profitable today. The fight over lifetime value versus acquisition cost against Uber and Bolt became his third book.
his third book + 2026 bio
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2018–now
SunRoof , CEO, now supervisory board chairman
CEO 2018–2024, built into one of Europe’s leading building-integrated photovoltaics companies. Chairman of the supervisory board since December 2025.
Angel in Hell, ch. 2 + 2026 bio
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2014–now
Angel portfolio , 40+ investments
He says no 19 times out of 20; 50–70% of angel deals go to zero.
Angel in Hell, word from the author
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2026–now
Eleven Ventures , Venture Partner
Venture Partner since January 2026, backing founders across the CEE region.
2026 bio
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2025–now
FaradayX , Founder
Energy-as-a-Service: ultra-light solar and storage. Founded June 2025.
2026 bio
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2026–now
Kepta , Founder and CEO
A technology company delivering legal work to businesses through an AI-native production system. Built from Warsaw and Stockholm.
2026 bio
DILIGENCE TRAIL
Every link goes to a third-party page.
Investors and partners who want the details: write to me .
Selected coverage
- 2026-10-04 XYZ · ArticleAI, lawyers and a new business model →
Profile of Kepta, the legal-services company Lech is building: software and lawyers in one company, fixed prices and a legal memory that grows with every matter, built for international markets from the start.
- 2026-01 Eleven Ventures (11.vc) · AnnouncementLech Kaniuk Joins Eleven Ventures as Venture Partner in Poland →
Eleven Ventures announces Lech Kaniuk as Venture Partner, backing founders across the CEE region.
- 2023 mamstartup.pl · Interview63 miliony złotych, nowa platforma, 1000 dachów i król Szwecji: Lech Kaniuk (SunRoof) podsumowuje 2023 rok →
Wywiad-podsumowanie roku 2023: 1000 sprzedanych dachów SunRoof i spotkanie z królem Szwecji.