Greg Isenberg on Building an AI Agent Business

X postGreg IsenbergOpinion

Greg Isenberg outlines the starting steps for building an AI agent business, describing the agent opportunity as a multi-trillion-dollar market.

Key points

  1. Isenberg frames AI agents as a multi-trillion-dollar market compared to the multi-billion-dollar SaaS sector.
  2. His strategy begins by finding a niche with an existing workflow linked to a payroll budget.
  3. The process involves shadowing human workers to specify and replicate their workflows.

Why it matters

It reflects a broader shift from traditional software tools toward AI agents designed to automate end-to-end paid human labour.

Analysis

Although truncated, the post highlights a concrete approach: rather than building software features in search of a problem, it focuses on directly observing and specifying workflows that companies already pay people to perform.

Original post

GREG ISENBERG

@gregisenberg · 1 July 2026

If I was starting a new company today, I'd start an agent business. SaaS was a multi-billion dollar market. Agents are a multi-trillion dollar one. How to build I'd build an agent business from 0: Spot the niche → find a workflow with a paycheck → shadow the human → spec… pic.twitter.com/4zShcY1Iwd

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Summary generated by AI (Gemini 3.8 Flash, 27 September 2026). It may contain errors – the original source is authoritative.

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