Benzion Zvi Klatzko is a United States-based Orthodox rabbi best known as the founder of In 2010, Rabbi Klatzko founded, a social networking website intended to bring Jews together to celebrate the Sabbath. is a website as well as an app available on IOS and Android. In addition, Klatzko has founded numerous other projects and websites including,,, Uma Alert,,, Hisoriri, and the online Jewish television network, All of these projects are maintained by the Od Yavo Foundation created by Klatzko in 2015. He posted on Facebook that in resposnse to Hurricane Irma, his sister Dr. Shula Wittenstein traveled from Israel to help assist in the post Hurricane Irma cleanup.

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