United Shidduchim is a research-informed Jewish dating initiative founded by Aaron and Emunah Karlin. It serves observant Jewish singles through a free catalog of profiles and a supporting community, with the goal of helping people identify and pursue suitable matches. Singles can request a profile for the catalog and share profile links to help the team connect potential matches. The catalog is also available to shadchanim as a database to support their work.

The initiative draws on research into frum dating patterns, including surveys of more than 500 observant Jewish singles worldwide. Its educational resources explore those findings through the concept of “intentionality,” and include training and material led by Emunah Karlin, described as a psychotherapist, neuroscientist, researcher, and attachment clinical specialist. The catalog includes categories such as never-married, divorced, widowed, over-40, and under-40 singles. United Shidduchim says participation is free and warns that requests for membership fees may be scams. It also maintains a WhatsApp group and handles its own community management and digital marketing.