We're excited to announce that Sim.ai is the first investment we’ve made at Standard Capital. I got to know the founders, Emir and Waleed, during their YC batch, and they’re exactly the kind of people we want to back—fast, technical, and building something genuinely useful for other builders.
What Sim.ai does
Sim is an open-source platform for building and running agent workflows. Think of it like a Figma-style canvas where you can connect blocks—functions, APIs, integrations like Supabase or Slack—and a sidebar where you can describe workflows in natural language. It gives you the power of code, but visually. You can still self-host, run locally, or mix in different model providers without giving up control.
The backstory
The idea came out of frustration. Emir and Waleed were working on an AI-powered sales product, and their agents.ts file had grown to thousands of lines. Every time a new model came out, they had to rewrite everything by hand. They realized the real problem wasn’t their product—it was that there was no good way to orchestrate agents. So early this year, right after Emir graduated from Berkeley, he called Waleed at Amazon and said, “Come to SF and let’s build this.”
They started hacking in January. Their first goal was to get 10 GitHub stars. Fast-forward: they got into YC, ended the batch with 4,000, and now have 17,000 stars and 60,000 developers on the platform. They spent all of YC focused on growth and distribution, refining a system that’s composable and unopinionated—a simple, extensible foundation for any agent workflow.
Why it’s working
Developers love Sim because it’s real software, not a “no-code” toy. Everything you can do in code, you can do in the canvas. There’s also a natural-language co-pilot that lets you describe what you want and watch the workflow assemble itself. Users range from YC startups to big enterprise and government teams. One legal-services company used Sim to automate email triage and cut their monitoring time in half—all deployed on-prem thanks to the open-source model.
Why we invested
Sim represents what Standard Capital is all about: AI-native, post-product-market-fit companies built by ambitious technical founders. Emir and Waleed move fast, help other founders, and have built one of the fastest-growing open-source projects on GitHub.
If you’re building in AI agents—or you just want to see the future of software—check out Sim.ai on GitHub. And if you’re a founder raising a Series A, this is the kind of energy we love to back.
-Dalton