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Hypothesis vs WebScrapBook: catalog facts
Hypothesis	WebScrapBook
Free Free for individuals. Institutional and LMS integrations are paid.	Free Free and open source under the MIT licence.
Web, Browser extension	Browser extension
Annotations anchor to the text and survive page reflow Private, group and public annotation layers on the same document	Builds an organised, searchable archive rather than loose files Annotations and highlights are stored with the capture
Requires an account and stores annotations on their service Anchoring can fail if a page changes substantially	Full features need the companion backend server running Setup is more involved than a one-click page saver
Browser extension	Browser extension
Open source	Open source
License: BSD-2-Clause	License: MIT
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 September 22, 2026	Official website Full listing and sources Checked September 22, 2026

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