Sites and apps similar to Diagramo include draw.io, which is free and open source. Other options are Excalidraw, LibreOffice - Draw, yEd Graph Editor and Dia. Diagram Editors like Diagramo are a crowded field, with more than 50 alternatives for Windows, Mac, Linux, iPad and iPhone.
Inwardis keeps what you know about a system as a hierarchical model rather than separate diagrams. Every element can contain sub-elements, so a person or an AI agent opens one level, sees what matters there and drills into a single branch.
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A diagram editor for architecture, process and software diagrams. Runs in the browser or as a desktop app and saves diagrams as readable YAML.
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Merge Plan is a user friendly diagram application. It is fully compatible with most diagram file formats. It is a great value in comparison to other diagram applications. It is part of Merge Soft Office.
Generate diagram-rich reports and documents, instantly. Generate software architecture diagrams, network diagrams, UML diagrams, cloud diagrams and many more!
Archium is an interactive architecture model of your system created automatically from your distributed tracing data.
With Ilograph diagrams, you define your resources once, then show how they're related from many different perspectives. Seamlessly change perspectives to demonstrate cross-functional dependencies and shared responsibilities.
