Their free hour-long test is fascinating to help you determine compatibility markers, however, there's zero way to tell if the person you're matched with also has an account, and therefore can reply to your questions.While owner Markus Frind has wiped the site of folks only looking for casual dating or an age-gap relationship, I've found this has only increased the incidence of folks lying about their age or intentions.
With an (estimated) 35 million unique monthly users, has the largest active membership of all the dating sites out there - and for good reason, however with some caveats: it's geared more towards folks looking for long term relationships, you'll want to carefully craft your profile to focus on such, and make sure you carefully review all emails for potential romance scams, as Match seems to attract more than their fair share of mysterious strangers trapped in Nigeria.
More » The largest of the free dating sites, POF boasts an (estimated) 23 million unique members using the site every month.
More » Zoosk hosts an estimated 11.5 million unique users a month, and it's easy to see why: the sign-up is quick and easy, there's little to no profile writing needed, and the search features prominently display photos.
Having said that, I've found a larger-than-average number of folks looking only for something casual here (likely due to the lack of time investment needed to join), and I've yet to hear of any successful relationships come out of the site (where readers tell me they've met The One, or something equally special, on the site).
Although this list can change every few months, the biggest of the bunch usually stay the same.
So if you're looking for an online dating site that offers the most active members, in all parts of the world with biggest features and most active forums, these are your best places to start.