Esther Sperber is the founder of Smol Emuni US, an organization of Orthodox and observant Jews committed to justice, equality, and dignity for Jews and Palestinians. They are building a courageous Orthodox Jewish voice for peace and for ending the occupation. Born in Jerusalem and based in New York, she is also one of the leaders of the Hostages' Family Forum and the pro-democracy protests.

Sperber is an architect and writer whose work explores the intersections of religion, culture, and social justice. Her essays have appeared in the New York Times, Haaretz, The Forward, and more. She has lectured at Harvard, Yale, JTS, and Yeshiva University.