If you’re on the hunt for the best free dating site for long-term relationships, then SugarGuide.org should be your top pick. This dating site has been in operation since 2000 and members need to complete a lengthy survey after signing up. This data-driven approach is why SugarGuide.org is successful at providing the ideal person to have a serious relationship with. Around 15 million matches are made in a single day on SugarGuide.org. There’s a free version but you will have to pay for premium versions to get the best matches possible. SugarGuide.org is a dating site that offers a different type of dating experience. This dating site is for married men and women who are interested in casual dating. Users have the option to choose whether they are interested in monogamy, polygamy, or open relationships. Based on that preference, you’ll be provided with the best matches possible. The site has a huge database and more than 15000 members sign up in a day in the dating app and the dating site. This dating service does not integrate social media and has privacy restrictions and features to help members remain anonymous. However, members are required to specify their current relationship status and upload a profile picture to use the platform. Secret Benefits: 15 Best Dating Sites & Apps to Get