Buttons is described as 'bookmarking tool that introduces innovative ways to save your favourite websites and collaborate with others. It helps you keep your personal bookmarks organised, uncluttered and safe' and is an website in the Office & Productivity category. There are more than 10 alternatives to Buttons, not only websites but also apps for a variety of platforms, including Google Chrome, Firefox, SaaS and iPhone. The best alternative is Raindrop.io, which is both free and Open Source. Other great sites and apps similar to Buttons are Diigo (Freemium), Pinboard (Paid), GGather (Freemium) and Stash.ai (Paid).
Sorted is an extension for Firefox. Use this if you find yourself manually creating bookmark folders. Just enter the words commonly occurring in your bookmark titles and this extension will automatically create folders and move your bookmarks.
TeamSync Bookmarks enables users to share and mange bookmarks across a team or friends in real-time. Share, manage, and sync anything with a URL in group folders that you create. Then, invite friends, family, coworkers, or teammates to your shared bookmark.