The Founder Stack

Build Software. Build Business.

The Founder Stack.
From concept to exit.

A 104-chapter manual and interactive toolkit for founders building software businesses — from first principles to exit.

Try the free tools Get full access →

104

Chapters

12

Phases

6

Tools

165

Key Terms

No signup required

Start with the free tools

Four standalone tools — each designed to make one concept immediately testable. No context required.

Unit Economics Calculator

Put in your numbers. Dial CAC, LTV, gross margin, and churn — watch the health indicator respond in real time. Takes two minutes to see whether your business is structurally sound.

Try it — free →

Startup Vocabulary Quiz

165 terms. Every domain — revenue, product, funding, GTM, exit. Test how well you actually speak the language of software business before you need to use it in a room.

Test your knowledge →

Business Judgment Scenarios

Real business situations, four plausible options, one right answer. After you choose, every option reveals its reasoning — right and wrong. Judgment, not memorisation.

Test your judgment →

Sales Motion Finder

Eight questions about your product and buyers. A specific GTM motion recommendation — PLG, SLG, Community-Led, or Founder-Led — with the full reasoning chain that produced it.

Find your motion →

The Complete System

Get the full manual and toolkit

Free access. No payment required. Enter your email and everything unlocks immediately.

The complete 104-chapter manual, organised in dependency order across 12 phases
Progress map with session notes for every chapter
Financial sandbox — unit economics, runway, and exit value models
67 scenario-based framework cards across 8 categories
165-term glossary quiz with full explanations
Channel evaluation matrix with weighted scoring