Sim
Workspace for building AI agents and workflows visually or by chat, with 1,000+ integrations and local models via Ollama/vLLM.
- License
- Apache-2.0
- Platforms
- Web, Docker
- Own API keys
- Yes
- Checked
- 2026-09-24
Sim works with OpenAI-compatible APIs. Grab a free key and a model from the catalog: for coding · for agents · providers and base URLs
Sim alternatives
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LLM app platform with visual workflows, RAG, agents and model management; supports Ollama and any OpenAI-compatible API.
Visual low-code builder for AI agents, RAG and MCP flows in Python; each flow can be served as an API or MCP server.
Open-source Zapier alternative with an AI agent builder and 280+ integrations that also work as MCP servers.
FAQ
Is Sim free?
Free to self-host with Docker; the cloud free plan includes 1,000 one-time credits.
Does Sim work with free models?
Yes. It supports your own keys and OpenAI-compatible APIs, so you can plug in free models from OpenRouter, Groq, NVIDIA Build, or a local Ollama.
What license does Sim use?
Apache-2.0. The source code is open.