Show your system relationships with a communication diagram tool

Draw complex logic chains and build a complete map of your systems with Miro’s UML communication diagram tool. See the big picture and enable your team to plan new functions and scenarios, all in one tool.

Over 70M+ users love Miro

Diagram ideas with a communication diagram maker

Turn your rough sketches into detailed communication diagrams as solutions are refined and validated. Lead your team in the right direction, creating space for innovation.

Why Miro is the best communication diagram tool

Build on feedback

Craft your technical diagrams with more agility by iterating and implementing changes after sprint reviews. With Miro’s collaborative features, easily share your board with your team and work alongside developers to seamlessly implement ideas.

Connect the dots

Illustrate all the working pieces of your system to clearly see how it operates and present your technical design. Easily start a conversation with stakeholders and get buy-in with diagrams that resonate across the board.

Create a visual hub

Equip teams with transparent processes that communicate everything they need to know. In Miro’s infinite workspace, link your online communication diagram to related roadmaps, designs, and code. Consolidate requirements, discuss solutions, and analyze processes, all in one shared space.

Foster collaboration

Design your diagram so that you and your team can stay aligned from initial brainstorming to launch. With collaborative discovery workshops and kick-offs, you’ll set your team up for successful execution and implementation.

Save time

Create a map of your entire system with a communication diagram maker, and analyze every step of your process to make better-informed decisions. Miro’s intuitive UI makes the crafting process more agile, allowing you to dedicate yourself to the tasks that matter most.

Set a growth mindset

Be flexible while maintaining alignment to your project’s long-term architectural vision. Miro’s collaborative workspace allows you to iterate quickly and communicate efficiently with your team while crafting and improving technical plans.

Related templates

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Plan, draw, and share an object-oriented system’s elements and components.

Plan object-oriented systems in a joint workspace that fosters collaboration and innovation using a UML class diagram.

Plan, analyze, and optimize activities by breaking them into subprocesses and constituent decisions.

How to create a communication UML diagram with Miro


Select the ready-made template

Click on the left toolbar and add the UML Communication Diagram Template to the board.


Add icons and shapes

Select the icons from the Diagramming panel and add them to your template.


Connect shapes

Add connector lines to your shapes and build your diagram how you want!

Integrated with your favorite tools

Ideas, inspiration, and intel in full view. Visualize marketing campaigns and client and prospect info to take action, and track tasks and status updates for the team.

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Loved by many teams

Customer stories

“Miro helps solve one of the major gaps in product design: how to manage tasks across product designers whose projects are in different tools.”

Jane Ashley

Head of Design at DocuSign

Communication diagram tool FAQs

In UML, communication diagrams depict how messages are communicated within a system. They focus on relationships within a system and the flow of messages, but not necessarily the order, time, or in which sequence they occur. Another communication diagram is the UML sequence diagram, which shows the time and order in which operations happen. Depending on the project you’re working on, you might choose a different UML diagram.

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