Product Market Fit

Product Market Fit

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Product Market Fit
Product Market Fit
Cursor, Manus, Same.dev, Lovable, Devin, Replit Agent, Windsurf Agent, VSCode Agent, Dia Browser, Trae AI & Cluely (And other Open Sourced) System Prompts, Tools & AI Models.
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Cursor, Manus, Same.dev, Lovable, Devin, Replit Agent, Windsurf Agent, VSCode Agent, Dia Browser, Trae AI & Cluely (And other Open Sourced) System Prompts, Tools & AI Models.

Inside the Prompt Stack: How Top AI Startups Are Building Moats Without Training Their Own Models

Guillermo Flor's avatar
Guillermo Flor
Jun 28, 2025
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Product Market Fit
Product Market Fit
Cursor, Manus, Same.dev, Lovable, Devin, Replit Agent, Windsurf Agent, VSCode Agent, Dia Browser, Trae AI & Cluely (And other Open Sourced) System Prompts, Tools & AI Models.
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The AI Application Layer is where most of the value in AI is going to be created, and yet every AI startup is using the same models.

Prompting will differenciate a good AI product from a bad one (and we can already see that).

For example: Cluely

I came across with a list of the best prompts used by some of the fastest growing AI startups today:

- Cluely
- Cursor
- Devin AI
- Junie
- Lovable
- Manus
- Replit
- Windsurf

You cannot only use these prompts for your own startup but they'll also help you understand how prompting is actually done succesfully and 100x your skills 🔥

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