Sim
Build, deploy, and orchestrate AI agents. Sim is the central intelligence layer for your AI workforce.
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What is Sim?
Sim is an open-source AI workspace for building, deploying, and managing AI agents in one place. It combines a visual workflow builder, a natural-language command center called Mothership, and an API so teams can create agents in the way that fits their style. The platform is aimed at people who want to automate real work with agents, from startups to large enterprises.
The product centers on connecting models, tools, data, and actions into workflows. Sim says it supports 1,000+ integrations and major LLMs such as OpenAI, Anthropic Claude, Google Gemini, Mistral, and xAI Grok, with support for local models through Ollama on self-hosted setups. It also includes built-in modules like Tables, Files, Knowledge Base, and Logs so teams can store data, share assets, and inspect execution details.
A big part of Sim is its agent-building experience. Users can build visually with drag-and-drop blocks, create agents conversationally through Mothership, or work programmatically through the API, SDK, CLI, and MCP access. The docs also show support for standalone tools, agent tools, structured outputs, asynchronous jobs, webhooks, scheduled triggers, and detailed run logs.
Sim is especially positioned for technical teams and operators who want to ship agent workflows quickly without giving up control. The website highlights prebuilt templates for common use cases like OCR processing, email triage, competitor monitoring, resume scanning, feedback analysis, and knowledge base Q&A. It also emphasizes real-time collaboration, role-based access control, SOC2 compliance, and enterprise features for teams that need security and scale.
Sim pricing
Pricing model: Freemium
Sim offers a free Community plan with 1,000 credits, 5GB file storage, 3 tables with 1,000 rows each, 1 personal workspace, a 5-minute execution limit, 7-day log retention, and CLI/SDK/MCP access. The Pro plan costs $25 per month and includes 6,000 credits per month plus 50 per day, 50GB file storage, 25 tables with 5,000 rows each, up to 3 personal workspaces, 50-minute execution, 150 runs per minute, unlimited log retention, and CLI/SDK/MCP access. The Max plan costs $100 per month and includes 25,000 credits per month plus 200 per day, 500GB file storage, 25 tables with 5,000 rows each, up to 10 personal workspaces, 50-minute execution, 300 runs per minute, unlimited log retention, and CLI/SDK/MCP access. Enterprise pricing is custom and includes custom credits and infrastructure limits, custom file storage, 10,000 tables with 1M rows each, unlimited shared workspaces, custom execution limits, unlimited log retention, SSO, SCIM, SOC2, self-hosting, and dedicated support.
Sim pros
- Open-source AI workspace
- Visual drag-and-drop workflow builder
- Natural-language workspace control with Mothership
- Programmatic API access
- CLI support
- SDK access
- MCP access
- 1,000+ integrations
- Supports major LLM providers
- Local model support via Ollama
- Built-in templates for common agent use cases
- Structured JSON output support
- Real-time multiplayer collaboration
- Role-based access control
- Detailed execution logs
- Built-in Tables database
- Shared Files workspace
- Knowledge Base for agent memory
- Asynchronous workflow execution
- Webhooks and scheduled triggers
- SOC2 compliant
- Enterprise self-hosting option
Sim cons
- Credit-based usage limits
- Free plan has only 1,000 credits
- Community plan has 5GB storage only
- Community plan has a 5-minute execution limit
- Community plan log retention is only 7 days
- Pro and Max pricing still require monthly subscription
- No workflow import from other automation platforms
- Some integrations require external API keys
- Advanced team features are mainly enterprise-focused
- Structured workflows may require careful configuration
- Many capabilities depend on the chosen model or tool keys
- Storage and workspace limits differ significantly by tier
- Enterprise pricing is custom and not transparent
- High-volume use may need the more expensive tiers
- Local model support requires self-hosting setup
Frequently asked questions about Sim
What is Sim used for?
Sim is used to build, deploy, and manage AI agents and workflows in a single workspace. It is designed for automating real work by combining models, tools, data, and execution into reusable agent systems.
How can I build in Sim?
You can build in Sim visually with the workflow builder, conversationally with Mothership, or programmatically through the API. The platform also supports CLI, SDK, and MCP access for developers who want more control.
What kinds of integrations does Sim support?
Sim says it connects to 1,000+ integrations across categories like search, documents, communication, data storage, and development tools. The website specifically highlights major LLMs and tools such as Slack, Gmail, Notion, Supabase, Pinecone, and GitHub.
Does Sim support team collaboration?
Yes. Sim supports real-time multiplayer collaboration with live cursors, presence indicators, concurrent editing, role-based access control, shared agents and workflows, and team workspace management.
What are Sim’s built-in workspace features?
Sim includes Mothership for natural-language workspace control, Tables for built-in structured data storage, Files for shared documents and media, Knowledge Base for uploading and syncing sources, and Logs for execution tracing. These modules are meant to help teams build and monitor workflows without stitching together separate products.
Can Sim return structured data?
Yes. The documentation shows that agents can be configured to return structured JSON using schemas, so outputs can be consistent and machine-readable. This is useful for workflows that need predictable fields rather than free-form text.
Does Sim support asynchronous execution?
Yes. The API documentation explains that workflows can be run asynchronously by passing async: true, then polling job status until completion. This is useful for longer-running jobs that should not block a request.
What is included in the free plan?
The free Community plan includes 1,000 credits, 5GB file storage, 3 tables with 1,000 rows each, 1 personal workspace, a 5-minute execution limit, 7-day log retention, and CLI/SDK/MCP access. It is positioned for individuals getting started with AI agents.
What enterprise features does Sim offer?
Enterprise includes custom credits and infrastructure limits, custom file storage, 10,000 tables with 1M rows each, unlimited shared workspaces, custom execution limits, unlimited log retention, SSO, SCIM, SOC2, self-hosting, and dedicated support. Pricing is custom rather than publicly listed.
Does Sim have ready-made templates?
Yes. The website lists prebuilt templates for use cases like OCR invoice processing, GitHub release agents, meeting follow-ups, resume scanning, email triage, competitor monitoring, social listening, data enrichment, feedback analysis, PR review, and knowledge base Q&A.