The Diffr Blog

Build logs, product thinking,
and brand philosophy.

From the desk of a solo founder building a brand curation platform from scratch.

Product

The Home Coffee Brand Guide: One Brand Per Slot, No Decision Fatigue

The home coffee rabbit hole is one of the most well-documented ways to spend three hours and end up more confused. Ten slots. Ten answers.

May 23, 2026 · 6 min read

Product

The Home Office Brand Guide: 13 Slots, 13 Brands, Every Decision Made

You have spent forty minutes on r/homeoffice. Still no desk. This guide assigns every slot — from chair to plant.

May 23, 2026 · 8 min read

Strategy

Diffr vs Wirecutter: Why "Best Overall" Is the Wrong Answer to the Wrong Question

Wirecutter is not the enemy. But "best overall" is information, not resolution. Here is the difference — and when to use each.

May 23, 2026 · 9 min read

Strategy

Stop Optimizing, Start Deciding: Why the Shopping Environment Is Designed to Prevent You from Choosing

The exhaustion you feel in the deodorant aisle is not a personal failure. It is a design specification.

May 21, 2026 · 9 min read

Strategy

Minimalism Sold You a $300 Linen Shirt

The minimalist aesthetic became a product category. The movement became a market.

May 21, 2026 · 7 min read

Strategy

The Decide-Once Rule: How One Commitment Eliminates a Category of Decisions Forever

Every category where you haven't truly decided is a running background process.

May 21, 2026 · 8 min read

Strategy

The Capsule Everything: Apply the Wardrobe Principle to Your Kitchen, Tech, and Hobbies

The structural insight that cleaned up your closet works everywhere — you just never applied it beyond your wardrobe.

May 21, 2026 · 8 min read

Strategy

The Cost-Per-Use Rule: The One Calculation That Changes Every Purchase

The most expensive thing you own is probably the cheap thing you never use — and a single calculation can expose that before your next purchase.

May 21, 2026 · 9 min read

Strategy

The Capsule Wardrobe Is Not the Point

You can own two hundred things and still have a fully closed decision architecture. You can own twenty things and still be trapped.

May 18, 2026 · 6 min read

Build Log

Building Diffr: The Scene Problem

Is 'knife' one slot or three? The answer determines the philosophy of every scene Diffr builds.

May 4, 2026 · 5 min read

Strategy

The Derivative Economy

Every time a brand changes hands, a book becomes a film, or a craft product gets scaled, something is lost. Information theory tells us precisely what and why.

Apr 27, 2026 · 7 min read

Strategy

What Bateson Actually Said

The phrase 'a difference that makes a difference' has been quoted so many times, in so many contexts, that it has become wallpaper. Here's what Bateson actually meant.

Apr 20, 2026 · 7 min read

Build Log

The Default Trap Is Now on Amazon

The book is out. The Default Trap: Why Everything You Own Is Owning You is now available on Kindle.

Apr 15, 2026 · 4 min read

Strategy

The Fridge Magnet Problem: How Infinite Options Became the Product

The modern market was not designed to help you choose. It was designed to prevent you from ever finishing the act of choosing at all.

Apr 14, 2026 · 7 min read

Strategy

The −13 IQ Point Tax

Every time you stand paralyzed in a cereal aisle, your effective intelligence is 13 points lower than it was when you walked in. This is not a metaphor.

Apr 13, 2026 · 6 min read

Build Log

How I Use Claude Code, NotebookLM, and Obsidian as One System

Three tools that seem unrelated — a terminal AI, a research notebook, and a markdown vault — turn out to fit together precisely. Here's the architecture I'm running to build Diffr.

Apr 5, 2026 · 7 min read

Strategy

The 13-IQ-Point Tax You Pay at Every Checkout

When you stand paralyzed in a supermarket aisle, you're not being indecisive. You're being taxed.

Apr 5, 2026 · 6 min read

Strategy

Original Priority: Why You Should Always Go to the Source

When you watch the adaptation of a book you've never read, you're not experiencing the story. You're experiencing someone else's compression of it.

Apr 5, 2026 · 7 min read

Product

The One-Brand Rule: A New Way to Think About Shopping

Every curated list eventually asks the same impossible question: which brand wins? Diffr sidesteps it entirely. One scene. One slot. One brand. No repeats.

Apr 4, 2026 · 5 min read

Strategy

Ship in Days, Not Weeks: What Indie Developers Actually Do

Marc Lou built 27 startups. Simon Høiberg runs a 7-figure business solo with AI. Both ship in days. Here's the methodology they actually use.

Apr 4, 2026 · 5 min read

Build Log

Building a Brand Database: 36,000 Brands, One Solo Developer

To build a brand curation app, you first need to know what brands exist. Building that knowledge base — 36,000 brands and counting — is most of the actual work.

Apr 1, 2026 · 6 min read

Strategy

Why More Choices Make You a Worse Shopper

Barry Schwartz called it the Paradox of Choice. More options don't make you happier — they make you more anxious, more likely to regret, and less likely to decide at all.

Mar 28, 2026 · 4 min read

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