Compare software

Swimlanes.io vs SequenceDiagram.org: catalog facts
Swimlanes.io	SequenceDiagram.org
Free Free to use.	Free Free to use, supported by optional Patreon donations.
Web	Web
Live preview while typing Share a diagram just by copying the URL	Text notation and drag and drop editing in one tool Saves to local files, Google Drive, OneDrive or browser storage
Only draws sequence diagrams The share URL changes with every edit	Only draws sequence diagrams No built-in real-time collaboration mentioned
Web application	Web application
Closed source	Closed source
License not stated	License not stated
No account needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.