What Is LangGraph? Build Smarter AI Agents with LangChain
LangGraph is an open-source framework designed to build and orchestrate agentic AI applications — especially ones that need to run multiple AI agents as a graph of interconnected steps. You can think of it as a specialized tool for creating workflows of AI reasoning and actions.
Vivek Rastogi
8/26/20251 min read
What is LangGraph in simple terms?
Imagine you run a team of virtual assistants (AI agents).
One assistant reads emails.
Another sorts them into “urgent,” “important,” and “junk.”
A third drafts replies for urgent ones.
LangGraph is like the manager who makes sure these assistants talk to each other in the right order, without anyone forgetting what they were doing.
It doesn’t do the job itself — it organizes who does what, when, and passes the right information along.
Why not just use one AI?
A single AI can do many tasks, but when things get complex (like handling a project with multiple steps), it might get confused or waste time.
LangGraph lets you create a flowchart of tasks where each step is clear.
If the process stops midway, it can resume from where it left off — no starting over!
Why not just use one AI?
A single AI can do many tasks, but when things get complex (like handling a project with multiple steps), it might get confused or waste time.
LangGraph lets you create a flowchart of tasks where each step is clear.
If the process stops midway, it can resume from where it left off — no starting over!
A real-life example
Say you’re planning a trip:
Agent 1 (Researcher): Finds cheap flights and hotels.
Agent 2 (Planner): Creates a travel plan based on your interests.
Agent 3 (Budgeter): Checks if the plan fits your budget.
Agent 4 (Booker): Makes reservations.
LangGraph is like your group chat admin — it makes sure each agent speaks in turn, passes messages, and doesn’t forget anything.
In short:
LangChain = gives you the building blocks to make one smart assistant.
LangGraph = lets you build an entire team of assistants working together like a flowchart.