Sim

Sim is an open-source AI workspace that lets teams build, deploy, and manage AI agents within their organisation. Founded in 2025 and headquartered in San Francisco, California, the company offers a collaborative platform connecting hundreds of integrations and every major large language model, with governance of access, spend, data and deployment handled from a single place. The company is Y Combinator backed and raised $7M in a Series A round.

The Sim Platform supports several ways of working: a visual workflow canvas, conversational chat, and programmatic building through code or a CLI. More than 100,000 builders use the platform, which is applied across verticals including automotive, real estate and enterprise technology. Technical work spans AI agents, large language models, workflow automation and agentic AI, with deployment options covering Kubernetes and Docker.

Engineering at Sim is shaped by an open-source ethos and a collaborative approach to platform design. Enterprise requirements are central to the product: the company maintains an enterprise-grade focus, including SOC 2 Type II, ISO 27001 and GDPR compliance. Roles typically involve working across open-source software, enterprise security and compliance, and AI agent infrastructure.