eHarmony was one of the pioneers in the online dating space, and -- while I haven't personally used this one -- we all remember the pitch, thanks to years of TV commercials: The service matches couples based on "29 dimensions" of compatibility (as determined by a thorough relationship questionnaire). While you can review the profiles of your prospective matches for free, you'll need to pay to unlock the full features of the service. But that comes with a guarantee: If, after three months of paid membership and communicating with at least five members, you're not satisfied, eHarmony will refund your money. Despite a rocky road that eventually involved a high-profile lawsuit, the site finally added same-sex dating in 2013, too. I have mixed feelings about using the site myself, but the site is at least technically more inclusive now.
When someone wants to register on a dating site, they will first need to create their profile online. A few sites have long questionnaires which help to generate a detailed profile of their character, and these are valuable for those who want a life-partner, marriage, or a soul mate. Other sites just want your basic information, such as hobbies, likes, dislikes, age, and occupation.
Age-based niches: These sites are for people of a specific age. Baby boomers are overwhelmingly turning to the web to find a mate. Sites like Match.com and POF.com offer members a chance to search specifically for the age group that interests you, but SeniorPeopleMeet.com and OurTime.com are the two largest sites designed specifically for the baby boomer market.