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Karakeep vs Betula: catalog facts
Karakeep	Betula
Free The open-source software is available without a license fee. Hosting, hardware and…	Free Free and open source under the AGPL-3.0 license.
Self-hosted, Web, Browser extension	Web, Self-hosted
Includes search and optional AI-assisted organization.	One binary and one SQLite file Fediverse following, likes and reposts
AI features require a separately configured model provider.	Single user per instance Fediverse features need a public domain and HTTPS setup
Self-hosted, Browser extension	Self-hosted
Open source	Open source
License: AGPL-3.0	License: AGPL-3.0
Not stated if an account is 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 September 22, 2026	Official website Full listing and sources Checked October 2, 2026

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