Short answer: No. Jainism does not reject Hinduism in the sense of denying its existence or value, but it is a distinct dharma with its own teachings, scriptures, and path to liberation.

Key points:

• Jainism arose in the same cultural setting as Hinduism but stands as a separate tradition with its own scriptures, Tirthankaras, karma theory, and goals (moksha).
• Jainism does not accept the Vedas as authoritative, and it rejects the caste-based social framework tied to some Hindu practices; it emphasizes ahimsa (non-violence), truth, and ascetic discipline as the path to liberation.
• Both traditions share some ethical values (like non-violence and truthfulness) and have influenced Indian spirituality, but Jainism maintains its own unique metaphysics and practices.
• There are differences between Digambara and Śvetāmbara traditions on various points, but both regard their path as a complete, independent route to final liberation.

If you’d like, I can explain specific similarities or differences in more detail.