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The Founder's
Intelligence Briefing.

Field notes on validation, market timing, and killing ideas before they kill you. No hype, no growth-hacks — just signal.

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▎ FEATURED
MAY 4, 2026
8 MIN
VALIDATION

How to estimate market size for a startup idea

TAM, SAM, SOM — three numbers that tell you whether your idea has room to grow or is too small to sustain a business. Here's how to calculate them honestly, without deceiving yourself or your investors.