The best free alternative to Lucidchart is draw.io, which is also Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to Lucidchart and loads of them is free so hopefully you can find a suitable replacement. Other interesting free alternatives to Lucidchart are Excalidraw, LibreOffice - Draw, Dia and yEd Graph Editor.
All-in-one system integrates project, task, and time management with customizable modular dashboards, collaborative image annotation, multiple task views, and granular workflow customization for teams of any size or industry, streamlining complex to simple projects.
Feature-rich diagram editor offering privacy-focused, ad-free experience with real-time collaboration, offline usage, dark mode, and cloud storage support. No registration required and compatible with various diagram formats, it excels in simplicity by not tracking user data.
It's NOT free. Lucidchart allows users to create up to 3 mind maps for free.
No registration, it's free.
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.
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.
yEd is a powerful diagram editor that can be used to quickly create diagrams manually or import external data for analysis and auto-magically arrange even large data sets by just pressing a button. You can use yEd to quickly create flow charts, BPMN and UML diagrams...
A secure collaboration platform for distributed teams offering real-time and asynchronous capabilities, infinite canvas, integrations with major tools like Google Suite, Slack, and Dropbox, and features for enhanced product development and design workflows.
Freeplane is a powerful and free software for building mind maps. It is a redesigned version of the well known FreeMind , and is created by one of FreeMind's key developers.
All-in-one system integrates project, task, and time management with customizable modular dashboards, collaborative image annotation, multiple task views, and granular workflow customization for teams of any size or industry, streamlining complex to simple projects.
PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams. The generator can be run anywhere within JVM and integrated with various application such as wiki, text editor, IDE, programming language, documentation generator, and others.
LimanDoc is a simple yet powerful tool for visualize files, diagrams, and construct a mind map with the possibility to edit Markdown text. It is an offline first desktop app with a 2D canvas that allows a preview of the inner folders (boards).
Whimsical is a collaborative visual workspace for creating flowcharts, wireframes, virtual sticky notes, and more!.
Efficient web-based tool for constructing high-quality commutative diagrams. Offers LaTeX export with embedded links, intuitive interface supporting both mouse and keyboard inputs, and features like multiple selections, macro support, and smart label alignment.
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Quick, easy to start with, good templates to begin modifying, integration with OneDrive, free! So far, it's everything I'd expect from a paid-for app like Visio.