Expectation of a future deliverer who sets a corrupted age right is not confined to Judaism, Christianity and Islam, and comparing the Abrahamic pattern with parallels elsewhere clarifies what is distinctive about it.
Maitreya is the Buddhist figure most often compared to a messiah: a bodhisattva now in a heavenly realm who will descend to earth in a future age, after the teaching of the historical Buddha has been forgotten, and will attain enlightenment and re-establish the dharma. Unlike the Jewish or Christian messiah, Maitreya does not judge the world or defeat cosmic evil; his coming depends on a decline in the teaching's survival rather than on repentance or covenant, and various East Asian movements, including millenarian rebellions in imperial China, have invoked his imminent arrival to authorize political action.
Kalki, in Hindu tradition, is the tenth and final avatar of Vishnu, prophesied to appear at the end of the current degenerate age (Kali Yuga), riding a white horse and wielding a sword, to destroy evil and restore dharma before a new cycle of ages begins. The figure functions inside a cyclical cosmology rather than a linear history moving toward a single unrepeatable end: Kalki's arrival concludes one cycle among an unbounded series, not history as such.
Zoroastrianism supplies the pattern many historians regard as most influential on later Jewish and Christian eschatology: a Saoshyant, a future savior born of the prophet Zoroaster's preserved seed, who will raise and judge the dead and inaugurate a purified, permanent world, a scheme close in structure, final judgment, bodily resurrection, a decisive end, to what Second Temple Judaism later developed, though the extent of influence remains debated among historians.