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Lucidchart vs Zen Flowchart: catalog facts
Lucidchart	Zen Flowchart
Freemium Free sign-up tier, with paid plans for more features and teams.	Freemium Free to start, with an optional paid upgrade.
Web	Web
Covers flowcharts, org charts and technical diagram types Runs in the browser with nothing to install	Very simple interface with one-click node creation Real-time collaboration with view, comment and edit roles
Requires an account Advanced features sit in paid plans	Deliberately limited feature set compared with full diagram suites Works online only
Web application	Web application
Closed source	Closed source
License not stated	License not stated
Account needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 2, 2026

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