By contrast, the J sites focus on people who want to meet with a local matchmaker and marry close to home.
"Their matchmakers are spending a tremendous amount of time with each individual," Goldmann said.
That's the new strategy of a group of rabbis who are launching a different kind of Jewish dating website called the "J sites" -- JMontreal, JMiami, JBoston and, coming soon, JNew York, JLondon, JBerlin and JHong Kong.
Like most dating sites, users pay a fee and compose a profile.
"The matchmaker adds a human element to the digital element," said Rabbi Chaim Lipskar, who went online with JMiami two months ago and has signed up 150 people so far.
The database gives the matchmaker access to potentially thousands more singles than he or she could otherwise come to know.
Warren, a 29-year-old J site user who preferred not to give his last name, said he is not at all religious but nonetheless wants to marry a Jewish woman and help address the Jewish continuity question. "I chose JMontreal because of the concept that somebody will actively look for somebody for me," he said.