Sim
Type: low-code · Vendor: Sim Studio · Language: TypeScript · License: Apache-2.0 · Status: active · Status in practice: emerging · First released: 2025
Provide a drag-and-drop canvas for building and deploying multi-agent workflows, where blocks for models, tools, and logic are wired into an executable graph without writing orchestration code.
Description. Sim (Sim Studio) is an open-source, drag-and-drop platform for building agentic workflows as visual graphs. Builders wire together blocks — model calls, tools, API connectors, conditionals, and loops — on a canvas that compiles to an executable workflow, with code escape hatches for custom logic. It is positioned as a 2026-native alternative to Langflow and Flowise for teams that want visual orchestration with deployment built in.
Agent loop shape. A visual graph of typed blocks compiled to an executable workflow; control flow is the wired canvas rather than imperative code.
Primary use cases
- visual agent workflows
- internal automations
- RAG and tool pipelines
- rapid prototyping
Key concepts
- Orchestrator-Workers → orchestrator-workers — The canvas compiles wired blocks into an orchestrated workflow graph that drives the agents.
- Tool Use → tool-use — Tool and API connector blocks let agents call external services from the canvas.
- Human-in-the-Loop → human-in-the-loop — Approval/manual blocks can pause a workflow for human input.
Patterns this low-code implements —
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References
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- Verification status: stub