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Sim

The AI Workspace for Building and Managing AI Agents

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About Sim

Sim is an open source workspace for the part of agent building that is not the model. Getting an LLM to answer is easy; the work is everything around it, namely the vector store, the twenty SaaS APIs, the structured data the agent reads and writes, the files it touches, and the logs you need when it does something inexplicable in production. Sim puts all of that in one Apache-2.0 licensed workspace, with agent workflows designed on a visual canvas and more than a thousand integrations already wired.

The positioning has moved deliberately up the value chain, from workflow builder to system of record. Alongside the canvas sit a knowledge base giving agents semantic memory over your own data, Tables for structured storage, a shared file store used by both the team and the agents, and Logs that trace every decision end to end with cost attached. Three authoring modes cover different people: visual for the operations person, conversational for the impatient, and code for the engineer who wants the real thing. Apache-2.0 plus self hosting plus SOC2 compliance on the hosted product removes the three objections enterprise buyers usually raise at once, and the named customers include Rivian, Russell Investments and eXp Realty.

Pricing

$0 - $100/mo

Free tier
  • Free$0/mo
  • Pro$25/mo
  • Max$100/mo
  • EnterpriseContact sales

From the vendor pricing page, 2026-09-19

Details

GitHub Stars 29,435
Forks 3,778
Founded 2025
Data from: GitHub • Website•Updated: Aug 19, 2026
agent-frameworkorchestrationtask-automationopen-sourcemulti-agent