From the OkCupid website: "What is OkCupid? It's a totally free matching service. It's also extremely accurate, as long as (a) you're honest, and (b) you know what you want. We don't claim to evaluate you perfectly, but we do claim to find someone who claims to fulfill your claimed requirements, exactly."
Membership includes access to quizzes and matching features to help you find a compatible woman.
The "QuickMatch" feature allows you to identify traits and interests that you and another person have in common.
OkCupid probably has the most advanced matchmaking features of any free dating site.
PlentyOfFish.com is one of the largest and most well known free dating sites.
“Plentyoffish has More Dates, More Relationships Than Any Other Dating Site. Our matching system for online daters helps improve your chances of finding a relationship by filtering out singles you would never date. Within minutes of signing up we give you 30 singles we think you would most likely date.”