Sim

What is Sim?

Sim is an open-source AI workspace for building, deploying and governing AI agents. Agents can be built visually, through natural-language chat, or with code through an API, SDKs, a CLI and an MCP server. The GitHub repository and SDK package names use simstudio.

Key capabilities of Sim

• Visual workflow builder: design agent workflows on a canvas, with scheduled workflows, event triggers and custom functions.
• LLM orchestration: works with OpenAI, Anthropic, Google, xAI, Mistral and Perplexity models.
• 270+ integrations: connect agents to external tools and data.
• Knowledge base and tables: document creation, tables, files and logs.
• Run tracing: block-by-block traces including cost and failures.
• Flexible deployment: deploy agents as chat, API or MCP endpoints.
• Governance: permission groups, spend limits, usage analytics, SSO and audit records.
• Self-hosting: supported with Docker or Kubernetes.

How Sim works

You assemble an agent from blocks on the canvas, or describe it in chat, choose a model and connect tools. Once deployed as a chat, API or MCP endpoint, runs are traced block by block so you can see cost and failures. Admins can limit which models, integrations and tools members may use.

Who uses Sim?

Developers and teams that want to build their own agents and keep control over models, spend and data. Self-hosting suits teams that need to run the platform in their own environment.

Sim pricing

Sim lists Free, Pro, Max and Enterprise plans. The overview page does not show prices or the contents of the Free plan, and current figures are on Sim's pricing page. The software is open source and can be self-hosted.

Sim alternatives

Beam AI focuses on enterprise process automation with prebuilt agents. Wordware lets teams build agents in a natural-language-driven environment. MultiOn is a browser-action agent for performing web tasks, rather than a workflow platform.