SingldOut is an exclusive dating site that connects single professionals via LinkedIn. They use a very complex method of matchmaking that involves a sample of each member’s DNA. They will send you a DNA kit after the sign up process. After that you will have to take part in a personality test. Finally you will be able to search members according to your own preferences. Their instant chemistry service is the DNA testing and matching technique because they have found that 40 % of chemistry between two individuals are due to their genes. All of their members must be 21 years or older. All types of singles are allowed to join.