Best Open Source Alternatives to Gliffy

Compare the best free and open-source alternatives to Gliffy — self-hosted and desktop replacements you fully control, ranked by GitHub stars, license and platform support.

Curated by open-source.store · Updated August 2026 · 6 alternatives

Gliffy

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Gliffy alternatives compared

Open-source alternatives to Gliffy, compared by stars, license and platform
Tool		License	Platforms	Self-hosted
Diagrams as Code	42,476	MIT	LinuxmacOSWindows	No	Jul 2026	Visit
PlantUML	13,215	GPL-3.0	LinuxmacOSWindowsDocker	Yes	Aug 2026	Visit
BPMN.io	9,623	MIT	Web	No	Jul 2026	Visit
Draw.io	7,230	Apache-2.0	LinuxmacOSWindowsDocker	Yes	Jul 2026	Visit
Diagrams	228	MIT	LinuxmacOSWindows	No	Apr 2025	Visit
Dia Diagram Editor	0	GPL-2.0	LinuxmacOSWindows	No	—	Visit