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Sim.ai

Category: AI Agents

Open-source visual platform for building AI agent workflows with a Figma-like drag-and-drop interface Sim.ai was founded in 2025. The company is led by Emir Karabeg. Based in San Francisco, CA, USA. Team size: 4-6. Total funding raised: $7M. Latest round: Series A, $7M, November 2025, led by Standard Capital. Key investors include Standard Capital (lead), Y Combinator, Perplexity Fund, SV Angel, Paul Graham, Ali Rowghani.

Founded
2025
Headquarters
San Francisco, CA, USA
Team size
4-6
Total funding
$7M

Value proposition

Simplifies complex AI agent development through a no-code/low-code visual interface, supports integration with multiple LLMs and tools, enabling 65,000+ developers to build production-ready AI workflows

Products and solutions

Visual workflow builder (canvas-based), AI agent orchestration engine, Pre-built integrations (Slack, Supabase, Pinecone, Gmail), Open-source libraries for custom agent development, Multi-agent collaboration system

Unique value

First open-source visual platform for building production-ready AI agents with a Figma-like interface, combining low-code accessibility with advanced customization for developers

Target customer

Developers, AI/ML engineers, and enterprises seeking to automate workflows using customizable AI agents

Industries served

Software Development, AI/ML, Enterprise Automation, Fintech, Healthcare, Education

Technology advantage

Open-source model with 18k+ GitHub stars, model-agnostic design supporting multiple LLMs, visual drag-and-drop interface, and a growing ecosystem of 65,000+ developers with strong community engagement

How they differentiate

Sim.ai differentiates through its open-source nature and specialized focus on AI workflows with a visual canvas interface, offering developers greater control and customization compared to general automation tools like Zapier, while maintaining simplicity for non-technical users

Main competitors

n8n, Zapier, AgentKit, Make.com, LangChain

Key partnerships

Y Combinator (X25 cohort), Standard Capital (Series A lead investor), Integration partners: OpenAI, Anthropic, Google Gemini, Groq, Ollama, Community partners: 100+ companies using in production

Notable customers

Department of Defense, 100+ companies ranging from early-stage startups to large enterprises (specific names not disclosed)

Major milestones

Closed $7M Series A funding (November 2025), YC X25 cohort (Spring 2025), 65,000+ developers on platform, 18k GitHub stars, 10M+ workflows processed, 100+ companies using Sim in production, Purchased Sim.ai domain for $220,000

Growth metrics

65,000+ developers on platform, 18k+ GitHub stars, 10M+ workflows processed, 100+ companies using in production, 18.6k GitHub followers

Market positioning

Positioned as a specialized AI agent workflow builder for developers, targeting niche use cases in AI automation rather than broad workflow automation, with strong traction in the developer community

Geographic focus

Primarily focused on North American markets with global developer community, headquartered in San Francisco, CA

Patents and IP

No publicly disclosed patents as of December 2025

About Emir Karabeg

Co-Founder and CEO of Sim Studio, studied Data Science and Cognitive Science at UC Berkeley where he conducted NLP research. Previously built Workninja (AI learning tool with 300k+ users) and was part of Y Combinator X25 cohort.

Official website: