The Bábi Faith is a religious movement that flourishes in Persia from 1844 to 1852, then lingers on in exile in the Ottoman Empire (especially Cyprus) as well as underground.

Its founder is Siyyid `Alí Muhammad Shirazi, who takes the title Báb—meaning "Gate"—from a Shi'a theological term.

Unlike other Islamic messianic movements, the Bábí movement signals a break with Islam and attempts to start a new religious system.

While the Bábí movement is violently opposed and crushed by the clerical and government establishments in the country in the mid 1850s, the Bábí movement leads to the founding of the Bahá'í Faith, which sees the religion brought by the Báb as a predecessor to their own religion, and gives a renewed significance to the Bábí movement.