The system of philosophy of Vallabhā-cārya or Vallabha (A. D. 1481-1531) is known as Śuddhādvaita.
Vallabha does not accept Śaṅkara’s (A. D. 788-820) advaita as sufficiently non-dualistic since he also accepts māyā, a principle of illusion, thereby negating non-dualism!
According to Vallabha, māyā is a real power of Brahman, the Saccidānanda, inherent in him. Hence, since there is no second reality different from or outside Brahman, his philosophy should be called Śuddhādvaita—is his claim.
See also VALLABHA.