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Sim

Visual agent builder with 1000+ integrations

Sim is an open-source platform for building, deploying, and orchestrating AI agents with a visual workflow editor. Connects 1,000+ integrations and LLMs with drag-and-drop canvas design, AI-assisted Copilot for generating nodes from natural language, and built-in knowledge base for RAG. Trusted by 100K+ builders. Includes 11 pre-built workflow templates for quick deployment.

About Sim

Sim is an open-source platform for building and orchestrating AI agent workflows through a visual canvas editor. Developers connect agents, tools, and integration blocks by dragging and dropping, then run workflows instantly. The platform integrates with over 1,000 services and supports all major LLM providers out of the box.

A built-in AI Copilot can generate workflow nodes, fix errors, and iterate on flows from natural language descriptions. The knowledge base feature lets teams upload documents to a vector store, grounding agent responses in domain-specific content. Sim includes 11 pre-built workflow templates covering common use cases that can be customized and deployed in minutes.

Trusted by over 100,000 builders at both startups and enterprises, Sim positions itself between no-code tools and full-code frameworks. It supports self-hosted deployment via Docker Compose for privacy-sensitive environments, while the visual approach makes agent orchestration accessible to teams without deep framework expertise.

Pricing & Platform Specs

Pricing Summary

100% free and open source under the Apache-2.0 license ($0 software cost). Sim Studio (sim.ai) provides a collaborative visual workspace and directed-graph simulation engine for designing, testing, and deploying multi-modal AI agent workflows.

full pricing breakdown →

Supported Platforms

Web (SaaS), self-hosted option

Explore categories, tags & use cases

Alternatives

All Sim alternatives →

Source-available LLM app development platform

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Flowise is an open-source, low-code UI and API platform for building customized LLM orchestration flows, multi-agent systems, and autonomous AI applications using drag-and-drop node graphs.

freemiumOpen Source

Workflow automation with AI nodes

n8n is a source-available workflow automation platform for connecting apps, APIs, data, and AI models through visual workflows and code. It supports self-hosted deployments and n8n Cloud, with integrations across communication, databases, CRM, project management, and model providers. Teams can combine deterministic automation with AI-powered steps and agent workflows while retaining control over deployment and data.

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LangFlow is an open-source visual framework for building multi-agent AI apps with drag-and-drop. Built on LangChain, it lets developers compose chains, agents, and RAG pipelines by connecting modular components visually. Features real-time interaction, Python customization, one-click deployment, and export to LangChain code. Supports all major LLM providers, vector stores, and tools. With 146K+ GitHub stars, it bridges visual prototyping and production deployment.

freemiumOpen Source

Community experience

Sources & verification

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Content verified

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FAQ

What is Sim?

Sim is an open-source platform for building, deploying, and orchestrating AI agents with a visual workflow editor. Connects 1,000+ integrations and LLMs with drag-and-drop canvas design, AI-assisted Copilot for generating nodes from natural language, and built-in knowledge base for RAG. Trusted by 100K+ builders. Includes 11 pre-built workflow templates for quick deployment.

Is Sim free?

Yes — Sim is open source and free to use. 100% free and open source under the Apache-2.0 license ($0 software cost). Sim Studio (sim.ai) provides a collaborative visual workspace and directed-graph simulation engine for designing, testing, and deploying multi-modal AI agent workflows.

Is Sim open source?

Yes — Sim is open source.

Is Sim still maintained?

Yes — Sim is active. Its listing was last verified on September 6, 2026.

What are the best Sim alternatives?

The first editor-selected Sim alternatives are Dify, Flowise, n8n, and more.