Beyond the confines of such formal schools and movements, however, the development of Bhakti as a major form of Hindu practice has left an indelible stamp on the faith.

The leader of the Bhakti movement focusing on the Lord as Rama was Ramananda. Very little is known about him, but he is believed to have lived in the first half of the 15th century. He taught that Lord Rama is the supreme Lord, and that salvation could be attained only through love for and devotion to him, and through the repetition of his sacred name. Chaitanya Mahaprabhu was an ascetic Hindu monk and social reformer in 16th century Bengal. A great proponent of loving devotion for God, Bhakti yoga, Chaitanya worshiped the Lord in the form of Krishna.

Sri Ramanuja Acharya was an Indian philosopher and is recognized as the most important saint of Sri Vaishnavism. Ramananda brought to North India what Ramanuja did in South India. He raised his voice against the increasing formalism of the orthodox cult and founded a new school of Vaishnavism based on the gospel of love and devotion. His most outstanding contribution is the abolition of distinctions of caste among his followers. Followers of Bhakti movement in 12th and 13th Century included saints such as Bhagat Namdev , and Saint Kabir Das , who insisted on the devotional singing of praises of lord through their own compositions.

Guru Nanak, the first Sikh Guru and founder of the Sikhism, too was a Nirguna Bhakti Saint and social reformer. He was opposed to all distinctions of caste as well as the religious rivalries and rituals. He preached the unity of God and condemned formalism and ritualism of both Islam and Hinduism. Guru Nanak`s gospel was for all men. He proclaimed their equality in all respects.

The sixteenth and seventeenth centuries continued to witness the rise of many religious reformers. The exponent of the Rama cult and the Krishna cult among the Vaishnavas branched off into a number of sects and creeds. The leading light of the Rama cult was saint-poet Tulsidas . He was a very great scholar and had made a profound study of Indian philosophy and literature. His great poem, `Ramacharitamanasa` , popularly called Tulsi-krita Ramayana is very popular among the Hindu devotees. He set before the people the image of Sri Rama as all virtuous, all powerful, the Lord of the World, and the very embodiment of the Supreme Reality (Parabrahma).

The followers of the Krishna cult founded the Radha Ballabhi sect under Hari Vamsa in 1585 AD. Sur Das wrote `Sursagar` in Brajbhasha, which is full of verses of the charm of Lord Krishna and his beloved Radha.