What is layered architecture?

A way of organizing software into horizontal layers, such as presentation, business logic and data, where each layer only uses the one below it. Keeping concerns apart like this lets you change one layer without rewriting the others.

What is the difference between a tech stack and an architecture diagram?

A tech stack is the list of technologies a system uses. An architecture diagram shows how the parts fit together. A layer diagram does a bit of both: the layers show the structure, and the child nodes name the tools.

Planning & Strategy

Technology Stack Layer Diagram Template

By RP Hobbyist · Updated October 2026

A layer diagram shows a system as a stack, where each layer depends only on the layers below it. It's the quickest way to explain how a piece of software is put together, and to point at where a new feature or a problem sits.

This template stacks four layers under a Technology Stack node: Presentation Layer, API Gateway, Business Logic and Data Layer. The nodes use the isometric shape, so in the editor the map looks like a stack of blocks. Add child nodes to each layer for the frameworks, services and databases it contains.

Technology Stack Diagram template as a mind map — The Layer Stacking Layout template as it opens in the editor.

It opens as a new map with 5 topics already filled in. You don't need an account.

Open in the editor

When to use a Layer Stacking Layout

Explaining a system's architecture to new developers
Writing architecture docs or a design proposal
Planning a migration, such as moving one layer to a new technology
Teaching layered architecture in a software course

What goes in each branch

Presentation Layer: What users see and use: web apps, mobile apps, admin dashboards.
API Gateway: The single entry point for requests, handling routing, authentication and rate limits.
Business Logic: The rules of the application, often split into services such as orders, billing or search.
Data Layer: Databases, caches, file storage and search indexes, along with what each one holds.

Example: An online booking system for a chain of gyms

Presentation: a React website, iOS and Android apps, and a dashboard for staff.
API gateway: a managed gateway that handles logins and rate limits.
Business logic: separate services for class schedules, bookings and payments.
Data: PostgreSQL for bookings, Redis for live class availability, and object storage for trainer photos.

Tips

Describe what each layer does in the layer node, and put tool names in its child nodes.
Color the parts that change in a migration so the scope is obvious.
Add a side branch for things that cut across every layer, like logging, monitoring and security.
Keep the diagram up to date. An out-of-date architecture diagram misleads people more than having none.

Using this template in Neuron Mapping

Click Open in the editor. The template opens as a new map.
Select a topic and press Tab to add a branch under it, or double-click a topic to change its text.
Select a topic to change its color and shape, or add notes to it in Markdown.
When you're done, export the map as a PDF or PNG, or save it to keep editing later.

Everything runs locally in your browser: your map is saved on your device, works offline, and can be exported as PDF, PNG or an editable .nmm file.