Pinboard is a social bookmarking website that describes itself as "a fast, no-nonsense bookmarking site for people who value privacy and speed." The service lets users bookmark content from any web browser, offers browser plugins, and a way to save open tabs in a minimal, fast, and secure environment.
You can connect up to three Twitter accounts (search the archives of your tweets), and configure Pinboard to automatically mirror public bookmarks from your accounts on Instapaper, Pocket and Readability. All of your bookmarks from Delicious, Google Bookmarks, Diigo, Firefox, Safari, and many other sources can be imported to your Pinboard account. Everything on the site is available as an RSS feed and you can import and export data in a wide variety of formats.
Unlike other popular bookmarking services, Pinboard caters to users who value privacy. You do not need to have any public bookmarks to use the site. Pinboard does not serve any third-party content to logged-in users—that means no scripts, images, analytics trackers, and no ads. You do not have to provide any personally identifying information to open a Pinboard account. The only requirement is a working email address.
There is a third-party clients.
There is a one time fee of under $10.53.
In addition to the basic features, Pinboard offers a bookmark archiving service for an annual fee of $25. The site will crawl and store a copy of every bookmark in your account, and display a special icon you can click to see a cached copy. If the page you bookmarked goes offline, you'll still be able to see the archived copy indefinitely.
Pinboard is a small site that features easy access to customer support and communicating with the developer. He is easy to reach through Twitter, IRC or email,.