Is there an Indian religion more ascetic than Jainism?

Jainism seems pretty extreme to me. Is there something more extreme than it? (extreme in any way).

Buddhism is pretty extreme for those who follow it to the core

AM

Hinduism is also hard to follow , but no one I guess follows it rigorously.

I am a Jain and I completely disagree with you. If you say Jainism is extreme, you're highly mistaken, HInduism, Budhism or the Muslim religion - all of them have beliefs that would seem extreme to one another