, while OKCupid is still the best free option. Finding The Best Dating Sites, our Sources. Another free site, Plenty of Fish (free claims to be "the world's largest dating site" and says it has 150 million registered users worldwide. Free dating sites keep money in your pocket. If you're just not sure you want to commit to a monthly subscription, you may want to try a free dating site. 18.99 per month for six months) is one of the biggest, longest-running online dating sites out there. And although our opinions may be subjective, we did base all ratings on a standardized scale in an attempt to be fair. Members skew a bit older: m says 25 percent are under 30, close to 49 percent are 30 to 49, and 26 percent are 50 and. Experts say the large user base sets Plenty of Fish apart, but they warn that quantity does not necessarily mean quality. There is no money-back guarantee. As with OkCupid, it's free to communicate with others, but there's a premium membership that adds additional features (Est. Ask Men "Best Online Dating Sites of 2018".