Sim is an open-source platform for building AI agents that connects to 1,000+ integrations and multiple LLMs including OpenAI, Anthropic, Google Gemini, Mistral, and xAI Grok.

It provides a visual workspace with 11 pre-built workflow templates, a natural-language command center called Mothership, built-in database tables, document storage, and execution logging. The platform is used by over 100,000 builders at startups and Fortune 500 companies and offers a free community plan plus paid tiers starting at $25/month, with SOC2 compliance available on enterprise plans.