Agent Orchestrator

The system's brain · LangGraph · CrewAI

The $0 AI Architecture Stack · 2026

What is the Agent Orchestrator?

The Agent Orchestrator is the brain of the system. It runs the end-to-end data flow — deciding when to call the LLM, when to retrieve from RAG, and when to invoke tools. LangGraph models this as a stateful graph with cycles and branches, while CrewAI coordinates multiple role-based agents working together as a crew.

Tools in this Layer

🕸️ LangGraph

Build stateful, multi-step agents as graphs with branching, cycles, and human-in-the-loop.

🤖 CrewAI

Orchestrate teams of role-playing agents that collaborate to complete complex tasks.

Cost

$0 / free tier

Both are open-source and run locally for free.

Explore the Full $0 AI Stack

1 Frontend Layer 2 Agent Orchestrator 3 RAG Pipeline 4 LLM Layer 5 Tool Use via MCP 6 Code Agent 7 Data Layer 8 Deployment Layer