Simily.com uses a proprietary algorithm to predict who you will be friends with among people you've never met. It's very flexible: you can join or start groups, go on dates, find great roommates, or track down startup cofounders (among other things). Friendship is a basic human need, but we think it will particularly appeal to people who are new to town, on vacation, have social anxiety, or simply want to meet new people with similar interests.