The following tables compare general and technical information for a number of web-based browser synchronizers. Please see the individual products' articles for further information. Unless otherwise specified in footnotes, comparisons are based on the stable versions.
Transmute is excluded because it is a MS Windows-based offline tool (with privacy advantages). Xmarks used to provide an option to avoid the Xmarks server, which required using a WebDAV or FTP server to store bookmarks, however this feature is no longer reasonably available.If any other tools offer a privacy advantage, list them in this paragraph or add a column to the tables.
Another aspect of synchronization not covered in this table is OPML import and export. Exporting OPML enables many other tools to read the feeds, bookmarks/favorites and other browser data. There may be significant differences in capability between multiple levels of subscription – some tools such as Transmute have three levels of subscription.
Provides IE plug-in and Firefox extension. Feb 12, 2012: Registration process in official site fails with the following message: "There was an error communicating with our mail server, or the email address entered was not valid. Registration was not successful. Please try again at a later time.".