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Conceptboard vs Ideon: catalog facts
Conceptboard	Ideon
Paid Paid service with a free trial.	Freemium Free to self-host under AGPL-3.0; the website also has a pricing page.
Web	Web, Self-hosted
GDPR-compliant hosting Tasks with assignees, deadlines and tags on the board	Live embeds from GitHub, GitLab, Gitea and Forgejo Real-time collaboration on one canvas
No permanent free plan mentioned Browser only	Requires Docker and PostgreSQL to self-host Young project with a small community
Hosted service	Self-hosted
Closed source	Open source
License not stated	License: AGPL-3.0
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 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.