Uploaded November 2025 | Updated September 2026, 2 weeks ago
Sim is building the visual, end-to-end agent builder — a platform where developers can design, test, and deploy real AI agents that work in production.
Founded by Emir Karabeg and Waleed Latif, Sim grew from a small San Francisco apartment to a community of 60,000 developers and 18,000 GitHub stars, recently raising a $7M Series A.
In this interview with YC’s Aaron Epstein, Emir shares how they’re building the infrastructure for the agent era, and what it takes to create AI systems that reason, retrieve, and act safely at scale.
Learn more about Sim at https://www.sim.ai.
Chapters:
00:00 – Building the Visual Agent Builder
00:36 – What Sim Does and Why It Matters
02:05 – From a SF Apartment to 60,000 Developers
04:20 – Finding Early Users and Product-Market Fit
07:05 – Designing an End-to-End Platform for Agents
10:30 – Powering the Open Source Agent Ecosystem
13:25 – Raising a $7M Series A
16:20 – Building Agents That Actually Work
20:10 – The Infrastructure for the Agent Era
23:40 – Advice for Builders in AI
Sim is building the visual, end-to-end agent builder — a platform where developers can design, test, and deploy real AI agents that work in production.
Founded by Emir Karabeg and Waleed Latif, Sim grew from a small San Francisco apartment to a community of 60,000 developers and 18,000 GitHub stars, recently raising a $7M Series A.
In this interview with YC’s Aaron Epstein, Emir shares how they’re building the infrastructure for the agent era, and what it takes to create AI systems that reason, retrieve, and act safely at scale.
Learn more about Sim at https://www.sim.ai.
Chapters:
00:00 – Building the Visual Agent Builder
00:36 – What Sim Does and Why It Matters
02:05 – From a SF Apartment to 60,000 Developers
04:20 – Finding Early Users and Product-Market Fit
07:05 – Designing an End-to-End Platform for Agents
10:30 – Powering the Open Source Agent Ecosystem
13:25 – Raising a $7M Series A
16:20 – Building Agents That Actually Work
20:10 – The Infrastructure for the Agent Era
23:40 – Advice for Builders in AI
