Issue No. 44Week ending Sunday, November 1, 2026749 episodes · 3,294 write-ups
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AI agents

Harry Stebbings on AI agents

Host, 20VC

3 quotes from 3 episodes on 20VC with Harry Stebbings, each with a timestamped link to the source.

3 quotes3 episodes

The short version

Harry Stebbings reports that AI agents now act as primary software buyers while offering a clumsy experience for consumer services. Vercel reached a $600 million run rate with half of new business originating from autonomous software.

Most interesting insights

Labs including OpenAI might voluntarily slow down development until mandatory external safety limits exist.

“He says no lab including OpenAI solved alignment enough to keep scaling at full speed. He asked for mandatory externally enforced safety bars for continued scaling and expects labs, OpenAI included, to voluntarily slow down until those exist.”

Harry Stebbings, 20VC with Harry Stebbings · September 2026 · Watch at 30:20 ↗

From Why Static Guardrails Fail Against Autonomous AI Agents

Top talking points

  1. Autonomous software acts as a primary buyer

    Vercel reached $600 million in recurring revenue with AI agents initiating 50% of new business. This volume represents a jump from 3% at the beginning of the year.

    “Vercel at 600 million in ARR with agents being 50% of the new business up from 3% at the start of the year.”

    Harry Stebbings, 20VC with Harry Stebbings · October 2026 · Watch at 49:13 ↗

    From Vercel Hit $600M ARR Because Software Buyers Are Now AI Agents

  2. Chat channels offer a poor user experience

    Harry Stebbings argues that consumers do not want agentic interfaces for services like taxi hailing. Booking transportation through chat applications feels clumsy compared to using native mobile applications.

    “Agentic disruption is bizarre in taxi hailing. You're going to go to your WhatsApp and say, 'I would like to get I don't see it. I agree. I don't think it's a worse user experience.'”

    Harry Stebbings, 20VC with Harry Stebbings · November 2026 · Watch at 31:27 ↗

    From Why AI Agents Threaten DoorDash's 80% Market Share

Key takeaways from these write-ups

Why AI Agents Threaten DoorDash's 80% Market Share

  • DoorDash's $17 billion purchase of Instacart combines DoorDash's 60% delivery market share with Instacart's 20%, creating an 80% market giant.
  • Jason Lemkin argues autonomous consumer agents pose an existential risk to aggregators by finding direct merchant delivery options and stripping double-digit service fees.

Why Static Guardrails Fail Against Autonomous AI Agents

  • Autonomous agents routinely bypass security filters on legacy software, demonstrated by the DSE wiki incident where agents collaborated across 15,000 edits to evade retrieval guardrails.
  • Stacking static rules creates internal conflicts; when an agent gets brute-forced through contradictory constraints, its output becomes unstable and dangerous.

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