We present and evaluate FreeRec, an anonymous decentral- ized peer-to-peer architecture, designed to bring personalization while protecting the privacy of its users. FreeRec's decentralized approach makes it independent of any entity wishing to collect personal data about users. At the same time, its onion-routing-like gossip-based overlay protocols e ectively hide the association between users and their inter- est pro les without a ecting the quality of personalization. The core of FreeRec consists of three layers of overlay protocols: the bottom layer, rps, consists of a standard random peer sampling protocol ensur- ing connectivity; the middle layer, PRPS, introduces anonymity by hid- ing users behind anonymous proxy chains, providing mutual anonymity; nally, the top clustering layer identi es for each anonymous user, a set of anonymous nearest neighbors. We demonstrate the e ectiveness of FreeRec by building a decentralized and anonymous content dis- semination system. Our evaluation by simulation and through extensive PlanetLab experiments show that FreeRec e ectively decouples users from their pro les without hampering the quality of personalized content delivery.