Kieran’s Substack - The AI Marketing Generalist

Kieran’s Substack - The AI Marketing Generalist

Agentic-Led Growth: A New Model for How B2B Companies Grow

How we are rebuilding HubSpot's GTM around AI agents, and what every B2B team can learn from it

Kieran Flanagan's avatar
Kieran Flanagan
May 15, 2026
∙ Paid

Everyone is frantically adding AI to their GTM. Very few are running a true agentic-first GTM. It’s the difference between integrating AI and reorienting your GTM around it.

We’ve seen this happen before.

When factories first got access to electricity in the late 1800s, most of them didn’t redesign their operations. They just replaced the steam engine wit…

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