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

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