Plaxo is an online adress book service founded by Napster co-founder Sean Parker, Minh Nguyen and two Stanford engineering students, Todd Masonis and Cameron Ring. Plaxo, based in Mountain View, California, is currently privately held and supported by venture capital including funds from Sequoia Capital . On May 14, 2008, Plaxo has reported it has signed an agreement to be acquired by Comcast. Plaxo did not disclose the terms of the deal. In May 2008, the website reported 20 million users.