open source diagramming tools like Visio - AI tools

EdrawMax is a versatile diagramming tool that allows users to create over 210 types of diagrams, including flowcharts, mind maps, org charts, and floor plans, with ease and style.

• Paid

Flowdia Diagrams is a touch-optimized diagramming software that enables users to create professional flowcharts, BPMN diagrams, mind maps, UML diagrams, and network diagrams with drag-and-drop functionality.

• Free Trial

Isoflow is an AI-powered diagramming tool that helps users model software systems, business processes, IT networks, and more with powerful visualizations and custom AI-generated icons.

• Freemium
• From 13$

FlowChartAI is an AI-powered flowchart generator that instantly converts text descriptions and images into professional diagrams, including flowcharts, mind maps, UML diagrams, and organizational charts without requiring design skills.

• Free Trial
• From 5$

Vexlio is an AI-powered diagramming tool that enables users to create precise, interactive diagrams with auto-snap alignment, LaTeX integration, and smart tools for business, technical, and academic applications.

• Freemium
• From 6$

Diagram-Generator is an AI-powered tool that transforms text prompts into professional diagrams instantly, supporting 16+ diagram types including flowcharts, ER diagrams, and mind maps with no design skills required.

• Freemium
• From 9$

AI Diagram Maker transforms text descriptions into professional software architecture diagrams in seconds, offering a conversational interface that replaces traditional time-consuming diagramming tools.

• Freemium
• From 5$

SmartDraw is a visual collaboration tool combining diagramming, whiteboarding, and data visualization into a single enterprise-friendly solution. It offers intuitive tools and templates for creating various visuals, from flowcharts to floor plans.

• Paid
• From 5$

PlantUML enables users to quickly create and export a wide range of UML and non-UML diagrams using a simple textual language, supporting diverse input and output formats for seamless integration into any workflow.

• Free

ZenUML is a multi-platform diagram-as-code tool focused on rendering interactive sequence diagrams and flowcharts quickly and securely in your browser or favorite development environments.

• Freemium

ToDiagram is a web-based tool that transforms structured data formats like JSON, CSV, YAML, and XML into interactive diagrams for easier analysis and editing.

• Freemium
• From 7$

Diagrams is a Mac-native application for creating structured diagrams with a clean interface, customizable palettes, and automation through Shortcuts integration, available via one-time purchase or subscription.

• Other
• From 9$

Docugram converts documents into interactive flowcharts. It offers a user-friendly interface with automatic layout algorithms and customizable design elements, enhancing project management and strategic planning.

• Freemium
• From 8$

Sankey Flow Show is a modern web application for creating Sankey diagrams and various flow diagrams directly in your browser, enabling users to visualize quantities through connection line widths and streamline diagram creation.

• Freemium

Edraw.AI empowers visual creativity with AI and templates, offering tools for generating and analyzing diagrams, charts, and presentations.

• Free

Software Ideas Modeler is a comprehensive CASE and diagramming tool that supports UML, SysML, ERD, BPMN, and many other technical diagram standards for software design and analysis.

• Paid

Diagramming AI is an advanced AI-powered platform that enables users to create, edit, and manage various types of diagrams including UML, workflows, and charts through intuitive AI commands and chat interactions.

• Freemium
• From 3$

Zen Flowchart is an intuitive online tool for creating flowcharts, mind maps, and diagrams with a minimal interface, real-time collaboration, and easy drag-and-drop functionality.

• Freemium

dAIgram is an AI-powered tool that converts flowchart images, sketches, and screenshots into editable digital diagrams using OCR technology.

• Freemium

Gleek is a text-to-diagram tool that transforms textual descriptions into professional diagrams, including flowcharts, ERD, UML, Gantt charts, and user journey diagrams, all through keyboard-only input.

• Freemium
• From 7$

MonoSketch enables users to quickly create ASCII sketches and diagrams, transforming ideas into visually striking designs for a range of applications.

• Free