Collaborative caching and browsing allow a group of users to utilize internet bandwidth in an optimal manner by minimizing outgoing requests and allowing cooperation during web research activities. LetSurf allows a group of clients to retrieve cached materials from within the group while collaborating through a user interface to access items indicative of group behavior, such as the most recent links visited by peer users and the most popular links visited. An implementation of the system is presented and evaluated in terms of latency in loading a sample set of web elements. © 2011 IEEE.