We like Ok Cupid's whole package — a huge user base, slick interface, the fact that it’s free — but its real strength lies in its robust matching algorithm.It not only asks you questions about your personality, likes, and dislikes (“Do you think women have an obligation to keep their legs shaved?For a monthly fee, dating sites claim they'll do the math for you and spit out your soul mate in return.Some websites gather data about you and crunch the numbers with all kinds of mathematical formulas and algorithms in order to fill up your inbox with compatible matches.For many people, this is much better than hiding the fact that you’re also in another serious relationship.Taking these people of regular dating sites means people looking for 1-1 relationships are less likely to come across people who’re already attached.When we think of online dating, we most likely think of sites for singles.

And it’s easy to get started: upload a few snaps from your Facebook profile, add an optional bio, and start swiping through other users in your area.

No other dating site works as hard to deliver you the exact right partners, and that means results: In our testing, we found the highest percentage of good matches with Ok Cupid, and the second-highest percentage of high-quality messages.

To unlock features like incognito mode, read receipts, and a larger inbox, you can upgrade to a paid plan for per month, but we think the free version is more than enough to get started.

So, because there’s a demand for it, married dating services do exist.

Though the sites may not encourage members to cheat on their partners, they do assist those who wish to do so, and have become very successful in the process.