Think You Can Find Love Without An Algorithm? You Might Be Wrong.

When Aaron Schildkrout cofounded HowAboutWe.com, he had a vision for online dating, one that didn't rely on complex mathematical calculations to determine whether two people are compatible. He pictured a site where real-life dates were the focus, so users got straight to what really matters: meeting face-to-face.

"We branded ourselves as the offline dating site, as explicitly an alternative to these profile-heavy matching algorithm dating sites," he told The Washington Post. "It's about getting offline, going to the real world and getting chemistry."

It appears to be a smart approach at first glance, but since its founding in 2009, HowAboutWe has evolved to depend more on formulas, not less. As more and more users joined the site, the challenge was no longer to show them as many potential dates as possible, but to show them the right dates. In order to create an experience worth coming back for, HowAboutWe needed to get smarter.

HowAboutWe's two-person data science team created an algorithm that combines a user's profile information (like date ideas and demographics) with data gathered from that person's behavior on the site (e.g. what kind of profiles they looked at and how often).

In contrast to HowAboutWe's focus on casual dating, eHarmony believes its users are looking for long term relationships and its algorithm reflects that. eHarmony members are required to fill out a personality questionnaire with hundreds of parts developed from research of around 50,000 happily married couples. To determine compatibility, historical data is paired with analysis of users' behavior on the site and the constraints, like target age range, people place on their matches.

As expected, predicting love is no easy feat. Match.com president Amarnath Thombre says that what users claim they're looking for is often not the kind of profiles they actually view. How did Match cope with the mixed signals? "We said, 'We're going to base these things way more on actions you take. . . . If you start breaking your rules, we're going to start ignoring your rules,' " Thombre explained.

On AshleyMadison.com, the popular matchmaking site for affair-seekers, matching is driven almost entirely by an algorithm. "At least when it comes to the topic of infidelity, traditional research avenues have been kind of absent," said founder Noel Biderman. "There aren't a lot of universities out there that can give you wholesale data on how unfaithful this population or society is or what triggers this."

Can a mathematical formula ever fully replace the magic of serendipity? It seems unlikely, but if the two can work together, we stand a better chance of finding love than ever before.

For more about Aaron Schildkrout dating site you can read our review on How About We.