Despite the fact that there are "hundreds" of sects, there are essentially two schools of thought:
- Hindu Tantras, which are theistic and originated in Bengal, India.
- And Tibetan Buddhism, which does not entail the worship of gods but does recognize Spiritual Beings.
To clarify matters for the Western reader, many Tibetan Buddhists admit the existence of gods, but they do not consider them worthy of devotion or, in some circumstances, even of attention.
Many of these characteristics may also be found in early Chinese Taoism.
You may also want to read more about Tantra Yoga here.