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Curio vs Ideon: catalog facts
Curio	Ideon
Paid Paid app with a free two-week trial.	Freemium Free to self-host under AGPL-3.0; the website also has a pricing page.
macOS	Web, Self-hosted
Notes, files, mind maps, tasks and Kanban boards in one workspace Freeform canvas for placing material anywhere	Live embeds from GitHub, GitLab, Gitea and Forgejo Real-time collaboration on one canvas
macOS only Paid after the trial period	Requires Docker and PostgreSQL to self-host Young project with a small community
Downloadable app	Self-hosted
Closed source	Open source
License not stated	License: AGPL-3.0
Not stated if an account is needed	Not stated if an account is needed
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.