Karthikeyan's Newsletter

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Oct 6, 2026

How I Built My First Cold Email Infrastructure From Scratch

A beginner's walkthrough: a separate domain, Google Workspace, SPF, DKIM and DMARC, Instantly, warmup, and a small first test campaign.

Sep 15, 2026

How to Turn an ICP Hypothesis into a Prioritized TAM

The process I am using to build, validate, and continuously improve an outbound account database.

Sep 2, 2026

Who, Why Them, Why Now? A Beginner's Guide to List-Led, Context-Led, and Signal-Led Outbound

Aug 17, 2026

What Is GTM Engineering? 16 Fundamentals to Learn Before Building AI GTM Agents

A beginner-friendly guide to understanding how GTM data becomes intelligence, how intelligence becomes a decision, how decisions become actions, and how outcomes improve the system.

Mar 5, 2026

The 8-Stage AI Product GTM Flywheel: A Practical Framework for Building and Scaling AI Products

Jan 30, 2026

Karthikeyan's Newsletter

How I Built My First Cold Email Infrastructure From Scratch

How to Turn an ICP Hypothesis into a Prioritized TAM

Who, Why Them, Why Now? A Beginner's Guide to List-Led, Context-Led, and Signal-Led Outbound

What Is GTM Engineering? 16 Fundamentals to Learn Before Building AI GTM Agents

The 8-Stage AI Product GTM Flywheel: A Practical Framework for Building and Scaling AI Products

The Full-Stack AI GTM Engineer: A Beginner's Guide to the Hottest Role in 2026

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