1.Match.com has millions of members and this is one of the largest dating services there is. What makes them special is keyword search, which helps you find people that share your interests.
2.eHarmony (www.eharmony.com) finds potential matches for you after you fill out a questionnaire. This profile is extensive and thus site is able to find you a match from other dating service members who is highly compatible.
3.Chemistry.com differs from other sites by offering service for busy professionals who don’t have much time to waste. They focus on bringing people together in real life as quickly as possible. It is supposed to be compete with eHarmony.
4.Yahoo! Personals (personals.yahoo.com) lets you discover great singles near you. It also lets you post a detailed profile and pictures. It has millions of users. The majority of people using Yahoo! Personals are between ages 20-45 and they are looking for serious relationships or casual dating.
5.PerfectMatch (www.perfectmatch.com) has over 4 million users. Just like in eHarmony and Chemistry, upon signing up you will create full online profile and their software will find other singles that may be your, well, perfect match.