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NeonLink vs Briefkasten: catalog facts
NeonLink	Briefkasten
Free Free and open source under the MIT license.	Free Free and open source under the MIT licence.
Web, Self-hosted	Web, Self-hosted
Low resource use, suited to Raspberry Pi Automatic icons, titles and descriptions	Self-hostable with Docker files included Also offered as a hosted instance
Basic feature set without archiving or sharing Docker is the only documented installation method	Setup needs a database and an OAuth provider configured No tagged releases
Self-hosted	Self-hosted, Hosted service
Open source	Open source
License: MIT	License: MIT
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 October 2, 2026

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