No they are not. hypothes.is does indeed annotate webpages (publicly and privately) Zotero is really a "Database" of references. those references could be sim

No they are not. hypothes.is does indeed annotate webpages (publicly and privately) Zotero is really a "Database" of references. those references could be simple bookmarks. The lasted version added to ability to annotate stored pdfs (but not webpages.)