Greg Isenberg · @gisenberg

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Linkedin Posts Sep 2026

From linkedin.com/in/gisenberg

I recorded a series of LinkedIn posts in September 2026 where I explored the emerging AI‑driven personal‑agent economy, mapped huge market opportunities, and sketched a concrete tariff‑refund startup concept.

I note that Zuck believes Muse reaching 100M+ users feels entirely possible.

I estimate that a 3‑person API company could reach 10M+ users through one great connector.

I compare the wrapper market ($800 B) to the harness market ($5 T+), calling the latter the mega opportunity.

I point out that roughly $15 billion in tariff refunds goes unclaimed every year because 80% of over‑charged customers never file.

I assert that "Your API becomes more important than your app."

I claim that agent harnesses truly are the new GPT wrappers.

For more context on my background, see my LinkedIn profile.