The best Vector Graphic alternative to Microsoft Visio is LibreOffice - Draw, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 100 alternatives to Microsoft Visio and 11 are Vector Graphic Apps so hopefully you can find a suitable replacement. Other interesting Vector Graphic App alternatives to Microsoft Visio are Dia, Excalidraw, Square Sketch and Apache OpenOffice Draw.
Draw lets you produce anything from a quick sketch to a complex plan, and gives you the means to communicate with graphics and diagrams. With a maximum page size of 300cm by 300cm, Draw is a an excellent package for producing technical drawings, general posters, and much else.
Open-source diagram editor supporting Linux, Windows, Unix, and Mac OS X, with features for constructing entity relationship, UML, flowchart, and network diagrams, customizable with XML-defined shapes, extensibility, and a GTK+-based graphical user interface.
Excalidraw is an open-source whiteboard tool that lets you easily sketch diagrams that have a hand-drawn feel to them. Available directly online as a web app and also through CodeSandbox to easily see how the code works, and the app is available for self-hosting.
Digital graph paper for diagrams, technical sketches and geometric art.
Draw, part of the Apache OpenOffice suite, is a graphics editor that gives you the tools to communicate with visuals and diagrams. With a maximum page size of 300cm by 300cm, Draw is powerful tool for posters, graphs, charts, and more.
Feature-rich, open-source Wireflow offers a collaborative platform for online creation of complex user flow prototypes. Ideal for team work in UI design, wireframing, and mind mapping, promoting idea sharing in real-time environment aided by modern whiteboard features.
ConceptDraw DIAGRAM v14 is the only product that supports Visio legacy, runs on macOS and Windows, and is a perpetual license. Import/Export VDX, VSDX, VSSX and Import VSD, VSS files.
WireframePro lets you draw and collaborate on user-interface mockups for websites and apps in less time.
Vexlio turns flowcharts, process maps, and diagrams into clickable, interactive visuals that can be shared with a link (no sign-in required to view).
Creative Docs .NET is a vector-based graphic design tool with support for rich text, ideal to quickly write short documents, manuals, posters, illustrations, schemas, plans, flow charts, and much more.
Diagrams is a powerful, flexible, declarative domain-specific language for creating vector graphics, using the Haskell programming language.
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It's free and open source, while Visio is proprietary and expensive.