https://github.com/simstudioai/sim
Open-source platform to build and deploy AI agent workflows.
https://github.com/simstudioai/sim
agent-workflow agentic-workflow agents ai aiagents anthropic artificial-intelligence automation chatbot deepseek gemini low-code nextjs no-code openai rag react typescript
Last synced: 6 days ago
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Open-source platform to build and deploy AI agent workflows.
- Host: GitHub
- URL: https://github.com/simstudioai/sim
- Owner: simstudioai
- License: apache-2.0
- Created: 2025-01-05T22:47:49.000Z (11 months ago)
- Default Branch: main
- Last Pushed: 2025-10-14T23:56:08.000Z (about 2 months ago)
- Last Synced: 2025-10-15T00:06:52.969Z (about 2 months ago)
- Topics: agent-workflow, agentic-workflow, agents, ai, aiagents, anthropic, artificial-intelligence, automation, chatbot, deepseek, gemini, low-code, nextjs, no-code, openai, rag, react, typescript
- Language: TypeScript
- Homepage: https://www.sim.ai
- Size: 273 MB
- Stars: 17,019
- Watchers: 97
- Forks: 2,200
- Open Issues: 85
-
Metadata Files:
- Readme: README.md
- Contributing: .github/CONTRIBUTING.md
- License: LICENSE
- Code of conduct: .github/CODE_OF_CONDUCT.md
- Security: .github/SECURITY.md
- Notice: NOTICE
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README
Build and deploy AI agent workflows in minutes.
### Build Workflows with Ease
Design agent workflows visually on a canvas—connect agents, tools, and blocks, then run them instantly.
### Supercharge with Copilot
Leverage Copilot to generate nodes, fix errors, and iterate on flows directly from natural language.
### Integrate Vector Databases
Upload documents to a vector store and let agents answer questions grounded in your specific content.
## Quickstart
### Cloud-hosted: [sim.ai](https://sim.ai)
### Self-hosted: NPM Package
```bash
npx simstudio
```
→ http://localhost:3000
#### Note
Docker must be installed and running on your machine.
#### Options
| Flag | Description |
|------|-------------|
| `-p, --port ` | Port to run Sim on (default `3000`) |
| `--no-pull` | Skip pulling latest Docker images |
### Self-hosted: Docker Compose
```bash
# Clone the repository
git clone https://github.com/simstudioai/sim.git
# Navigate to the project directory
cd sim
# Start Sim
docker compose -f docker-compose.prod.yml up -d
```
Access the application at [http://localhost:3000/](http://localhost:3000/)
#### Using Local Models with Ollama
Run Sim with local AI models using [Ollama](https://ollama.ai) - no external APIs required:
```bash
# Start with GPU support (automatically downloads gemma3:4b model)
docker compose -f docker-compose.ollama.yml --profile setup up -d
# For CPU-only systems:
docker compose -f docker-compose.ollama.yml --profile cpu --profile setup up -d
```
Wait for the model to download, then visit [http://localhost:3000](http://localhost:3000). Add more models with:
```bash
docker compose -f docker-compose.ollama.yml exec ollama ollama pull llama3.1:8b
```
### Self-hosted: Dev Containers
1. Open VS Code with the [Remote - Containers extension](https://marketplace.visualstudio.com/items?itemName=ms-vscode-remote.remote-containers)
2. Open the project and click "Reopen in Container" when prompted
3. Run `bun run dev:full` in the terminal or use the `sim-start` alias
- This starts both the main application and the realtime socket server
### Self-hosted: Manual Setup
**Requirements:**
- [Bun](https://bun.sh/) runtime
- PostgreSQL 12+ with [pgvector extension](https://github.com/pgvector/pgvector) (required for AI embeddings)
**Note:** Sim uses vector embeddings for AI features like knowledge bases and semantic search, which requires the `pgvector` PostgreSQL extension.
1. Clone and install dependencies:
```bash
git clone https://github.com/simstudioai/sim.git
cd sim
bun install
```
2. Set up PostgreSQL with pgvector:
You need PostgreSQL with the `vector` extension for embedding support. Choose one option:
**Option A: Using Docker (Recommended)**
```bash
# Start PostgreSQL with pgvector extension
docker run --name simstudio-db \
-e POSTGRES_PASSWORD=your_password \
-e POSTGRES_DB=simstudio \
-p 5432:5432 -d \
pgvector/pgvector:pg17
```
**Option B: Manual Installation**
- Install PostgreSQL 12+ and the pgvector extension
- See [pgvector installation guide](https://github.com/pgvector/pgvector#installation)
3. Set up environment:
```bash
cd apps/sim
cp .env.example .env # Configure with required variables (DATABASE_URL, BETTER_AUTH_SECRET, BETTER_AUTH_URL)
```
Update your `.env` file with the database URL:
```bash
DATABASE_URL="postgresql://postgres:your_password@localhost:5432/simstudio"
```
4. Set up the database:
First, configure the database package environment:
```bash
cd packages/db
cp .env.example .env
```
Update your `packages/db/.env` file with the database URL:
```bash
DATABASE_URL="postgresql://postgres:your_password@localhost:5432/simstudio"
```
Then run the migrations:
```bash
bunx drizzle-kit migrate --config=./drizzle.config.ts
```
5. Start the development servers:
**Recommended approach - run both servers together (from project root):**
```bash
bun run dev:full
```
This starts both the main Next.js application and the realtime socket server required for full functionality.
**Alternative - run servers separately:**
Next.js app (from project root):
```bash
bun run dev
```
Realtime socket server (from `apps/sim` directory in a separate terminal):
```bash
cd apps/sim
bun run dev:sockets
```
## Copilot API Keys
Copilot is a Sim-managed service. To use Copilot on a self-hosted instance:
- Go to https://sim.ai → Settings → Copilot and generate a Copilot API key
- Set `COPILOT_API_KEY` environment variable in your self-hosted apps/sim/.env file to that value
## Tech Stack
- **Framework**: [Next.js](https://nextjs.org/) (App Router)
- **Runtime**: [Bun](https://bun.sh/)
- **Database**: PostgreSQL with [Drizzle ORM](https://orm.drizzle.team)
- **Authentication**: [Better Auth](https://better-auth.com)
- **UI**: [Shadcn](https://ui.shadcn.com/), [Tailwind CSS](https://tailwindcss.com)
- **State Management**: [Zustand](https://zustand-demo.pmnd.rs/)
- **Flow Editor**: [ReactFlow](https://reactflow.dev/)
- **Docs**: [Fumadocs](https://fumadocs.vercel.app/)
- **Monorepo**: [Turborepo](https://turborepo.org/)
- **Realtime**: [Socket.io](https://socket.io/)
- **Background Jobs**: [Trigger.dev](https://trigger.dev/)
- **Remote Code Execution**: [E2B](https://www.e2b.dev/)
## Contributing
We welcome contributions! Please see our [Contributing Guide](.github/CONTRIBUTING.md) for details.
## License
This project is licensed under the Apache License 2.0 - see the [LICENSE](LICENSE) file for details.
Made with ❤️ by the Sim Team