The best open source alternative to Lucidchart is diagrams.net, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 100 alternatives to Lucidchart and many of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Lucidchart are Dia (Free, Open Source), LibreOffice - Draw (Free, Open Source), Freeplane (Free, Open Source) and PlantUML (Free, Open Source).
diagrams.net (previously draw.io) is a free online diagram drawing application for workflow, BPM, org charts, UML, ER, network diagrams. No login or registration are required and features include the ability to save locally (including SVG), a range of stencils, .
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diagrams.net vs Lucidchart opinions
Most users think diagrams.net is a great alternative to Lucidchart.
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.
Top positive commentabout 2 years ago
No registration, it's free.
Top positive commentabout 1 year ago
provides everything lucid chart does, but for free
Positive comment • over 1 year ago
Rollo Has all of Lucidchart's features, but for free. A little slower performance-wise but gets the job done easily. The free version of Lucidchart limits how big your chart can be, but draw.io doesn't limit you in the slightest and gives you absolutely everything for free.
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.
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.
Penpot is the first Open Source design and prototyping platform meant for cross-domain teams. Non dependent on operating systems, Penpot is web based and works with open web standards (SVG). For all and empowered by the community.
TiddlyMap is a TiddlyWiki plugin that turns your favourite personal note taking software in a wiki-concept-map hybrid! Yes, you will be able to do both: drawing maps and putting down knowledge in a wiki way.
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.
VYM (View Your Mind) is a tool to generate and manipulate maps which show your thoughts. Such maps can help you to improve your creativity and effectivity. You can use them for time management, to organize tasks, to get an overview over complex contexts, to sort your ideas etc.
Umbrello is a Unified Modelling Language (UML) modelling tool and code generator. It can create diagrams of software and other systems in the industry-standard UML format, and can also generate code from UML diagrams in a variety of programming languages.