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Kan vs Nullboard: catalog facts
Kan	Nullboard
Freemium Free to self-host under AGPL-3.0; the cloud service has a free start with paid plans.	Free Free and open source under the BSD 2-Clause license.
Web, Self-hosted	Web
Imports boards from Trello Workspace members and per-board visibility	Stores board data locally in the browser Imports and exports board data as JSON
Integrations are still listed as coming soon Self-hosting needs a PostgreSQL database	Minimalist feature set
Self-hosted, Hosted service	Web application
Open source	Open source
License: AGPL-3.0	License: BSD-2-Clause
Account needed	Not stated if an account is needed
Needs internet	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 8, 2026

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