The best alternatives to Drup are Raindrop.io, Bookmark OS, and across-tabs. If these 3 options don't work for you, we've listed a few more alternatives below.
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Hurreeโ The smarter, simpler way to analyze your data
Bookmark OS uses Mac / Windows inspired UI to help you organize your bookmarks. Access anywhere. Bookmark OS is a responsive website. Use it on your laptop, phone, or tablet.
Wrapper browser extension that lets you control your tabs. Group your tabs into wrappers. View/open them anytime you want from anywhere. Share wrappers with friends and colleagues. Available on Chrome & Firefox.
Take back control of your bookmarks. Scrapp is a lightweight, universal bookmark manager that helps you manage, maintain and read your bookmarks, wherever you are.
Organise bookmarks into collections and then find your favourite websites quickly and easily, using an intuitive search rather than wading through masses of folders.