Lucidchart Alternatives

Mermaid

Since 2014

Diagrams as text: flowcharts, sequences, ER.

Switch for Open source instead of Freemium · Web, Markdown · open source.

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PlantUML

Since 2009

Text diagrams, especially UML.

Switch for Open source instead of Freemium · Local, Web · open source.

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Excalidraw

Since 2020

Hand-drawn style whiteboard.

Switch for Open source instead of Freemium · open source.

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diagrams.net

Since 2005

Draw.io: free general diagram editor.

Switch for Open source instead of Freemium · Web, Desktop · open source.

More about diagrams.net · 8 alternatives · Medium to switch

D2

Since 2022

Modern text-to-diagram language.

Switch for Open source instead of Freemium · Local · open source.

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nomnoml

Since 2014

Tiny UML-as-text tool.

Switch for Open source instead of Freemium · open source.

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Graphviz

Since 1991

Classic graph layout from DOT files.

Switch for Open source instead of Freemium · Local · open source.

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Structurizr

Since 2014

C4 architecture diagrams as code.

Same price, platforms, and license as Lucidchart.

More about Structurizr · 8 alternatives · Low to switch