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Petri Kajander

Building the future with purpose and clarity

Essays and conversations on building companies, money and freedom, and the inner life, in English and Finnish.

About Petri →

718
pieces: 138
conversations: 170
book notes: 221
in Finnish

NowPrivacy-first iOS apps: Nuotit, Lappaa, Nootti

Where to start

For foundersHow to build your startupPractical help for founders how to build your startup.Startup booksStartup funding essentials317 pieces on building companies

A bookFragments of RealityDaily Entries of Lived Life. 103 short pieces in 9 chapters, written 2003–2005, to read here.Also a full audiobook (5 hours)

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Latest writingAll writing →

NoteTechnology and the media shift

The lack slop

Digital richness has reset the value signals. The AI slop reveals them.

13 Aug 2026 · 1 min read

Technology and the media shiftLappaa slides into your DMs9 Feb 2026
Technology and the media shiftThe Airchat experience7 Oct 2024
Technology and the media shiftDecentralise but customise19 Mar 2024
Building companiesThe AI future2 Oct 2023
Technology and the media shiftIs AI an existential threat?20 Sept 2023

From the shelf170 book notes →

Decoded and Selling in a Crisis13 Nov 2022
Age of Invisible Machines9 Oct 2022
Summer readings16 Aug 2022
How to reboot the society – The Network State way7 Aug 2022
The Business of Belonging9 Apr 2021
Startup CEO26 Mar 2021

ConversationsAll podcasts →

Talks with Petri, 2020–2022: 48 conversations with founders and thinkers. Purpose 'n Clarity, 2021–2023: 75 episodes for founders.

Ahti HeinlaThe impossible equation23 Nov 2022
Hannu RyopponenIKEA—Ingvar Kamprad’s startup from 194325 Oct 2022
Micke PaqvalénYou can fight gravity but cannot beat it25 Sept 2022
Andrew ZinchukUkrainian startup ecosystem1 Sept 2022
Mikko RevonniemiFounder burnout20 Jul 2022
Per BylundEntrepreneurs and inflation19 Jun 2022

SuomeksiKaikki 221 →