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Harry Foster
Harry Foster

Published on May 10, 2024, updated on May 27, 2024

In the digital age, architecture diagrams are crucial for understanding, designing, and communicating complex system architectures. Whether it's software development, network design, or project planning, clear and accurate diagrams guide and support these processes. Given the wide range of options available, choosing the right software for creating architecture diagrams can be a challenge. To help you make the best choice, here's an overview of nine popular diagramming tools that are both powerful and user-friendly, essential for crafting your architecture diagrams.

1. Boardmix


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Boardmix is a professional diagramming tool offering a wide range of diagram types including architecture diagrams, UML diagrams, ER diagrams, BPMN diagrams, mind maps, flowcharts, and more. It comes in both free and paid versions, making it ideal for individual and team drawing and collaboration needs.

Key features

Intuitive and user-friendly interface

Real-time multi-user collaboration

An extensive set of creative tools

Cloud storage with multi-device sync

A variety of architecture diagram templates and other resources

Integration with other tools

2. Diagrams.net


Diagrams.net, formerly known as draw.io, is a collaborative online diagramming tool that also offers an offline desktop app for enhanced security. It’s free and open-source, making it ideal for teams that prioritize data security by storing diagrams in secure or offline locations.

Key features

Real-time collaboration

Offline desktop application

Local storage of diagrams in the browser

Integration with Google Drive, Sharepoint, OneDrive, GitHub, GitLab, Dropbox, and Notion

Supports UML, C4, ArchiMate, BPMN, and SysML shapes

Includes icon sets for AWS, Azure, GCP, Cisco, and Kubernetes

3. Lucidchart


Lucidchart is a collaborative diagramming tool offering various templates and shape types for creating flowcharts, process diagrams, mind maps, and more. It has both free and paid versions, which is suitable for the team that requires collaboration with others in diagrams.

Key features

Real-time collaboration with your team

Data integration

Integration with other tools

A library of preset templates

4. Excalidraw


Excalidraw is a collaborative virtual whiteboard with a paid option called Excalidraw+. It’s free and open-source, with additional paid features. It's ideal for teams looking to create diagrams using predefined components quickly.

Key features

Hand-drawn style quick sketches

Simple and minimalist interface

A library for quickly adding predefined components

End-to-end encryption

Share drawings via links

NPM library integration into your applications

Excalidraw+ offers comments, version control, and search

5. tldraw


tldraw is a collaborative online tool for creating diagrams. It's free and open-source, making it a great choice for those seeking a free and open-source diagramming solution.

Key features

Flexible drawing of shapes and lines

Change sketch styles

Sticky notes

Multi-user collaboration mode

tldraw snapshots for quick sharing and saving

6. Gliffy


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Gliffy is a collaborative drag-and-drop diagramming tool that requires a paid subscription. It's best for large teams looking to create software architecture diagrams and meet enterprise needs.

Key features

Real-time collaboration

Support for UML, ER, data flow, process, and C4 modeling

Cloud architecture diagrams

Integration with Jira, Confluence, and Google Drive

7. OmniGraffle


OmniGraffle is a desktop application for macOS and iOS designed for creating diagrams and prototyping. It requires a paid subscription and is ideal for storing diagrams locally and working with various file types.

Key features

Layered documents, grids, and auto-layout

SVG import and paste

Visio import and export

Apple Pencil support

Object metadata

Support for PNG, JPG, GIF, BMP, TIFF, PDF, EPS, and PSD file types

8. Miro


Miro is a collaborative whiteboard tool with templates and team-based features, designed to facilitate workshops. It offers free and paid versions, making it suitable for teams collaborating on diagrams and conducting workshops.

Key features

Real-time editing on an interactive whiteboard

Hover to see who's viewing your diagram

Workshop tools like timers and voting

9. CloudSkew


CloudSkew is an online tool for creating cloud architecture diagrams, offering free and paid versions. It's ideal for individuals looking to quickly create architecture and network diagrams for major cloud platforms.

Key features

Icon sets for AWS, Azure, GCP, Kubernetes, IBM Cloud, Alibaba Cloud, and OCI

Auto-save to the cloud

Architecture diagrams, network diagrams, and flowcharts

Chart templates


Choosing the right diagramming software is crucial for your workflow and the quality of your outputs. Whether you're a personal user or part of a collaborative team, the tools listed above offer a variety of features to meet different needs. Boardmix is a simple yet versatile online diagramming tool that's free to use. Give it a try today!

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