/AI9h ago

Paul Graham Recommends Marketplaces to Make Startups AI-Proof

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Paul Graham@paulg#77inAI

One heuristic for making startups AI-proof is to make things human intelligence can't compete with either. For example, marketplaces are proof against AI competitors for the same reason they're proof against human ones.

5:14 PM · Jun 7, 2026 · 59.2K Views
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Many users agreed with Paul Graham that marketplaces create strong AI-proof moats for startups thanks to network effects, liquidity, and human trust that models cannot replicate.

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Patents are similarly protective. It's no use being able to think of an idea if you can't legally implement it.

(AIs might of course be better at finding ways around patents. But on the other hand patent filers can also use AIs to predict these and seal them off.)

One heuristic for making startups AI-proof is to make things human intelligence can't compete with either. For example, marketplaces are proof against AI competitors for the same reason they're proof against human ones.

9hViews 21KLikes 79Bookmarks 17
Ailon@loneyai

@paulg Almost no investor wants to fund marketplaces now.

9hViews 122Likes 1
George Lutas@GeorgeLutas1

@paulg A fascinating case study I've seen was the adoption of the D-pad. It was originally patented by Nintendo in 85' but you'll notice D-pads in all sorts of controllers that...didn't get licensing, we'll say.

The way people oft do this today is operate from places like China.

7hViews 27
Colin Gardiner@ColinGardiner

@dwlz @loneyai @paulg You called!

6hViews 7Likes 1
George Lutas@GeorgeLutas1

@paulg Fascinatingly enough, one of the things you could argue that AIs can't do (in practice) very easy is be flagrantly misaligned for human purpose.

Bypassing IP protection on technicality of "so-and-so country won't enforce this" is mal-alignment. Humans can do this easily.

6hViews 13

@loneyai That's not true. But if it were I'd say: Send them to me; I'll fund them.

9hViews 43Likes 3
Syed Raza@syedrazavc

@paulg @0xdotdot How can you determine if the founder is relentessly resourcesful without meeting them or having direct access, say if you want to invest through an SPV in a YC startup?

8hViews 8
Socrato@_socrato

@me0205863 @paulg Translate

7hViews 4
Daisy Liang@Daisyyy_LS

what I love about this: it quietly moves the question from "how smart is your product" to "what compounds when you're not looking." the most AI-proof things are weirdly human — reputation, trust, the messy network of people who vouch for you. intelligence was never the moat. belonging was.

7hViews 139Likes 1
Zen@altmorizen

@paulg Instructions clear. Currently building a startup where we just scream into a plastic bucket for 8 hours. AI literally cannot compute the ROI.

9hViews 105Likes 1

@0xdotdot Any category in which companies are being founded by relentlessly resourceful founders. (I.e. it's about the founders, not the idea.)

8hViews 60Likes 1
George Zonix@georgezonix

@paulg Marketplaces go back to ancient times, A product or service I can pay for or exchange. It’s physical and practical, the digital world require somewhat of an understanding of the abstraction and to be able to use the medium of the computer to interact with the product.

6hViews 3
Ask The W@AskTheWHQ

@paulg Will be interesting how agents plays in this space. Demand side agents bidding and dynamic pricing plays by supply side agents will be interesting to watch. Marketplace-ops can be rebuilt with agents and automation as well

9hViews 86
Florah@FayChep476320

@paulg I agree 💯

9hViews 86
Ixonix@IxonixYT

@paulg Yep. AI can clone features, but it still can’t conjure liquidity, trust, or habit.

8hViews 26Likes 1
Mayank Agrawal@mayankagrawal

@paulg so close to saying 'proof of human' ;)

9hViews 83
Simple buff@me0205863

@paulg Hakuna matata 😂

9hViews 80
Artem Kukharenko@aikukharenko

@paulg yeah marketplaces have that network effect moat that's basically unbeatable once you hit scale

same reason why even with all the AI tools out there, people still default to the platforms with the users/liquidity

5hViews 72
George Lutas@GeorgeLutas1

@paulg I've spent a heck of a long time looking at the eBay marketplace specifically because they've devolved into utter insanity, and while it IS rather difficult to handle that double exchange issue well, there are cracks in the armor (at least in the case of eBay). Maybe generalized?

7hViews 21Likes 1
tauhou@ttauhou

@paulg it also makes this kind of startups more proof to funding hype cycles, which is a double-edged sword

9hViews 62
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