The B2B Stack

The B2B Stack

Weekly Roundup - What Moved In B2B This Week?

Mike Harty's avatar
Mike Harty
Jan 24, 2026
∙ Paid

Last week didn’t announce itself as a “big” week in B2B.

The B2B Stack follows the emerging trends in B2B marketing, as we aim to get 6-12 months ahead of the market

No single platform launch.

No dramatic M&A.

No shiny new acronym.

But once you line the stories up, a very clear pattern emerges:

Signals are drifting away from the places we’ve historically measured them — and re-appearing somewhere else entirely.

Below are the stories that mattered, followed by what they collectively tell us.

AI quietly becomes an ad surface, not just a tool

OpenAI’s ad ambitions are no longer theoretical. Analysts now estimate ChatGPT-native advertising could become a $25bn+ revenue business by 2030, putting it on a collision course with Google and Meta.

This isn’t about banner placements inside a chatbot.

It’s about buyer intent forming inside AI workflows — before search, before social, before websites. We’ve talked a lot about this over the past 6 months

Why it matters:

If buyers increasingly research, compar…

User's avatar

Continue reading this post for free, courtesy of Mike Harty.

Or purchase a paid subscription.
© 2026 Mike Harty · Privacy ∙ Terms ∙ Collection notice
Start your SubstackGet the app
Substack is the home for great culture