Sim

Sim is an open-source AI workspace that lets teams build, deploy and govern agent workflows from one place, whether they prefer a visual canvas, a chat prompt or code. It aims at the gap between hobby automation tools and enterprise agent platforms: you get workflows, knowledge, tables and observability, plus spend limits and permission groups, and you can still self-host the whole thing. Being able to deploy any workflow as an MCP endpoint makes it useful for teams whose staff already work inside AI assistants.

What is Sim used for?

Sim is used to automate multi-step work with AI agents and to give an organization one governed place to run them. Typical uses include:

• Building agents that read a knowledge base and answer internal questions
• Scheduled workflows that collect data, summarize it and post results
• Event-triggered automations that react to new tickets, emails or records
• Writing documents and files as agent outputs
• Deploying a workflow as a chat app, API or MCP endpoint for other tools
• Tracking cost and failures per run, workspace and member

Who Sim is best for

Sim suits AI engineers, operations teams and IT departments that want an open-source alternative to closed agent builders, especially when some builders like a canvas and others prefer code. It fits organizations that need spend controls across many users. Small teams that only want simple app-to-app automations may find a classic automation tool quicker to learn.

Sim pricing

As of October 2026, Sim has a free plan with 1,000 one-time credits, one workspace, 5GB of storage and 30-day log retention. Pro costs $25 per user per month with 6,000 credits a month plus 2,000 a week, 3 workspaces, teammates, higher concurrency and unlimited log retention. Max costs $100 per user per month with 25,000 monthly credits plus 4,000 a week, unlimited workspaces and features such as Sim Mailer, knowledge base live sync, sandboxes and Slack Connect. Annual billing saves 15 percent. Enterprise is custom and adds access control, SSO, SOC 2 compliance, self-hosting and dedicated support. The open-source code can also be self-hosted on your own.

Sim limitations

• Free credits do not renew, so the free plan is for trying the product
• SSO, access control and managed self-hosting require Enterprise
• With 270+ integrations, the catalog is smaller than the largest automation platforms
• Per-user pricing adds up for large teams on Pro or Max

Sim vs alternatives

n8n is the better choice for teams that want a mature, widely used self-hosted automation engine with a large community and many app nodes. Make suits people who want detailed visual scenarios for business processes. Zapier AI wins on the number of app integrations and ease for nontechnical staff. Relevance AI focuses on agent teams for sales and operations. Sim stands out when you want an open-source agent workspace with three ways to build, MCP deployment and organization-level spend controls.

Tips for getting started with Sim

Use the free credits to build one workflow from a template and inspect the block-by-block trace to see where credits go. Set member spend limits as soon as you invite colleagues. Deploy a working agent as an MCP endpoint and test it from the assistant your team already uses. If you plan to self-host, start with Docker before moving to Kubernetes.

Sim FAQ

Is Sim free?

Sim has a free plan with 1,000 one-time credits, and the code is open source for self-hosting. Paid plans start at $25 per user per month.

Is Sim open source?

Yes. Sim describes itself as an open-source AI workspace, publishes its code on GitHub, and supports self-hosting with Docker or Kubernetes.

Can Sim deploy agents as MCP servers?

Yes. Sim lets you deploy agents as chat, API or MCP endpoints, with access controlled by SSO, email or password.

Sim vs n8n: which is better?

Sim is better if you want an agent-first workspace with chat and code building plus spend controls, while n8n is better for broad app automation with a larger community.