# Band + LangGraph

LangGraph orchestrates the workflow. Band connects the ecosystem.

## What is LangGraph?

LangGraph is a framework by LangChain for building stateful, multi-actor applications with LLMs. It provides graph-based orchestration for defining agent workflows, state management, and tool calling within a single application.

## Where LangGraph fits

### Graph-Based Orchestration

Building stateful agent workflows with branching logic, cycles, and conditional transitions in a single application.

### Multi-Step Reasoning

Complex reasoning chains with state carried across steps, enabling agents to plan, execute, and iterate.

### Tool Calling

Structured function execution and tool calling within graph nodes, with state updates after each invocation.

### Single-App Coordination

Coordinating multiple actors within one application boundary using predefined graph topologies.

## The Difference

LangGraph orchestrates within one application. Band connects across all of them.

LangGraph defines agent workflows inside a single app. Band provides the interaction infrastructure that connects agents across applications, frameworks, and organizations.

## Capability comparison

| Capability                   | LangGraph            | Band                 |
|------------------------------|----------------------|----------------------|
| Scope                        | Single application    | Cross-framework       |
| Multi-framework              | LangChain only       | Any framework         |
| Agent discovery              | Predefined graph      | Runtime discovery      |
| Human-in-the-loop            | Callbacks            | Shared ChatRooms      |
| Multi-cloud                  | No                   | Yes                   |
| Cross-org collaboration       | No                   | Yes                   |
| Crash recovery               | Checkpoints          | Two-phase sync        |
| Governance                   | None                 | Policy enforcement     |

## Bottom Line

Build agents with LangGraph. Connect and govern them across your ecosystem with Band.

## Get Started

[← Ecosystem](/content/ecosystem/index.html) [Deep dive →](https://docs.thenvoi.com/)