The Ariel Institute unites a number of Torah institutions that work to train rabbis and dayanim.

Ariel is also a publishing house that prints Seforim in thought and halakhah and prepares important manuscripts for publication. It began in 1932 as  "Harry Fishel Institute for the investigation of the Talmud"  on the initiative of Rabbi Avraham Yitzchak HaCohen Kook. Today the "Nezer David" Institute, deals with the teachings of Rabbi David Cohen, (The Nazir) and publishes his writings and the writings of his son Rabbi Shear Yashuv Cohen.