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At a glance
WHAT IT’S REALLY ABOUT
Sim.ai builds Figma-like canvas for end-to-end AI agents workflows
- Sim.ai is a visual, AI-native agent builder that lets users create end-to-end workflows via drag-and-drop plus natural-language prompting.
- The company pivoted from a misguided marketing product to Sim after experiencing firsthand how painful and complex it was to manage many interdependent agents in code.
- Sim’s growth strategy centers on being truly open source and repeatedly orchestrating launches to hit GitHub Trending, driving both stars and cloud signups.
- Monetization comes from a hosted cloud platform where developers pay for inference and get an easier setup than running locally.
- Karabeg emphasizes founder execution habits—shipping on a fixed cadence, staying close to what you understand, and optimizing for long-term learning and endurance.
IDEAS WORTH REMEMBERING
5 ideasBuild where your pain is strongest and your understanding is deepest.
Sim emerged from the team’s prior product where coordinating “hundreds of agents” was internally confusing; the pivot worked because they leaned into what they already knew (LLMs/agents) instead of unfamiliar industries.
Differentiate by being AI-native, not just “workflow software with an LLM step.”
Karabeg argues legacy automation tools lack AI-first primitives like easy iteration, natural-language construction, and scaling an agent to run many times with synthesis—capabilities already common in code but absent in older platforms.
Open source works when it’s genuine and paired with a clear platform vision.
Sim’s bet is that code won’t be the moat in an era where models can replicate apps quickly; the moat becomes product vision, velocity, and an ecosystem that builds on the foundation.
Treat GitHub Trending as a growth surface you can deliberately engineer.
They coordinate simultaneous announcements (Hacker News, Product Hunt, Twitter) to create a burst of attention that drives Trending placement, which then produces hundreds-to-thousands of stars per day.
Convert OSS interest by making the hosted path the easiest path.
Sim links its cloud product directly from GitHub and observes a strong correlation between star spikes and new cloud users; the cloud offers convenience and paid inference versus local setup.
WORDS WORTH SAVING
5 quotesSim is a platform to build AI agents… a Figma-like canvas with Cursor style side prompt.
— Emir Karabeg
I basically only know things about LLMs and building agents.
— Emir Karabeg
If we get this to 100 GitHub stars, I’ll be super happy… Actually you’re right. So if it gets to 10, I’ll be satisfied.
— Emir Karabeg
Code is no longer the proprietary part of a company anymore as it used to be.
— Emir Karabeg
We don’t go live because it’s ready, we go live because it’s Saturday night.
— Emir Karabeg
SPEAKERS
Aaron Epstein
hostHost of YC Root Access.
Emir Karabeg
guestFounder of Sim.ai, a visual end-to-end platform for building AI agents/workflows.
High quality AI-generated summary created from speaker-labeled transcript.
