Jainism was not founded by one person as a new religion. It is an eternal dharma according to Jain belief.

• Jain tradition says the teachings of Jainism are beginningless and endless.
• In every time cycle, there are 24 Tirthankars who rediscover and teach the path to liberation.
• The 24th Tirthankar, Bhagwan Mahavir, lived in the 6th century BCE and gave the most recent well-known guidance of Jain Dharma in this era.

So, Jainism was revealed and revived by Tirthankars, not created at one time by a single founder.

Main teachings:

• Ahimsa — non-violence
• Satya — truth
• Asteya — non-stealing
• Brahmacharya — chastity/purity
• Aparigraha — non-attachment

If you want, I can also explain how Bhagwan Mahavir spread Jain Dharma.