SubProfile was the original and most popular free AIM profile service, with 3 million registered members. With SubProfile, AOL Instant Messenger users could create a customized AIM profile with a counter, visitor log, guestbook, journal, and more. The site was featured in the Wall Street Journal's MarketWatch.com and was one of the top 10 most visited sites by teenagers in 2002.

SubProfile.com was part of the SubProfile Network, a collection of web properties targeting teenagers and college students.