The influences on Sikhism, According to scholars, were derived from the dominant religious practices prevailing in the 15th century, namely, Hinduism and Islam. Sikhism is believed to have emanated from some principles of Hindu `bhakti` traditions and Vedic philosophy as well as Sufism. The Islamic commentators opined that Sikhism reflected certain basic ideas of the Muslim faith while the Hindu researchers believed that the Sikh faith had drawn greatly from the reformation movements of Hinduism. A synthesis of these views was forwarded by the Western historians and philosophers who considered the Sikh faith to have been a product of a deliberate attempt of uniting the miscellaneous ideologies governing the Islamic and Hindu beliefs under the same umbrella. It is necessary to note that while these views have been in vogue, a close study reveals that more often they are not based on practical evidences.

It is true that Guru Nanak had travelled extensively to Mecca and Medina to propagate the teachings entailed in Sikhism. Moreover, the Sikhs` adherence to monotheism and their propagation of universal brotherhood among all devotees reflected Islamic beliefs. However, it is not enough evidence to suggest that Sikhism was considerably influenced by the teachings of Islam. This is further escalated by the later accounts of conflict between the Mughals and Afghans with the Sikhs which reflects rather an anti-Islamic stance.

With respect to Hinduism, certain ideologies practiced in Sikhism are considerably similar like those of `karma`, `moksha`, `maya` and `dharma`. A notable example here may be the Hindu concept of ‘transmigration of souls’ which is also reflected in the teachings of Guru Nanak where he calls for maintaining a disciplined form of life to ensure the attainment of salvation and union with God. However, various traits of Hindu religious belief had also been rejected by the Sikh scriptures formulated by the Gurus. The concept of worshipping the formless God as practiced by Sikhism is completely opposed to the Hindu practices of idolatry. Moreover, the class hierarchies devised by the Hindu scriptures were condemned by the Sikh faith which called for equality of all human beings irrespective of caste, creed or gender. The concept of `avatars` or incarnations of the deities were also rejected by Sikhism.

Observations of the Western commentators have also been critiqued for considering Sikhism as a homogenized version of the Hindu and Muslim religions rather than recognizing its diversity. This is primarily because this opinion was derived from the study of certain obscure accounts regarding the life and teachings of Guru Nanak. Such facts hold little significance to ascertain this opinion as a standard mode.

A significant influence on Sikhism was derived from the Sant tradition of northern India. The Sants, prevalently known as the `Nirguna Panth` or `Nirguna Sampradayya` were popularly believed to have been an offshoot of the Vaishnava sects and throughout the 15th to the 17th centuries they exercised considerable influence over certain theological faiths of the eras, particularly Sikhism. The philosophies of Guru Nanak expose a significant impact of the Sant figures, prominently Kabir. In fact it is impossible to segregate the dominant strains of the Sant tradition and Kabir in order to understand the faith propagated by Nanak. The concept of mystical union with God and the theories of salvation formulated and preached by Guru Nanak derived their origins in the Sant tradition only. The concept of the `Satguru` of the Sant tradition also finds an echo in Sikhism. Under the Sant tradition, the term `Satguru` symbolizes the one responsible for aiding a devotee to achieve union with God. In Sikhism, the `Satguru` is the intermediary who abets the ways and means of comprehending the presence of God.

The primary purpose of Guru Nanak, the first of the ten Sikh Gurus was to establish a faith that called for a unification of all beliefs. This holds immense importance in the pages of history as it was a thought much ahead of its times and conceived in an era which was marked by constant strife between the principal religions of the age, Islam and Hinduism. `Na koi hindu, na koi musalman` was one of the memorable excerpts of Guru Nanak. While, an acute observation reveals various features that were common between these religious faiths, the primary intention of Guru Nanak was to establish a faith that would eventually saturate the conflict between these religions and the product was a universal faith, Sikhism.