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Trello vs Nullboard: catalog facts
Trello	Nullboard
Freemium Free plan for up to 10 collaborators per workspace; paid plans remove limits.	Free Free and open source under the BSD 2-Clause license.
Web	Web
Simple, visual Kanban boards Inbox captures items from email and Slack	Stores board data locally in the browser Imports and exports board data as JSON
Free plan limited to 10 boards and 10 collaborators per workspace Hosted only, no self-hosting	Minimalist feature set
Web application, Hosted service	Web application
Closed source	Open source
License not stated	License: BSD-2-Clause
Account needed	Not stated if an account is needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 8, 2026

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