What about Hinduism? It's a collection of different believes and is a name given to several religions. It has no known founder and no single authority.
Here is my oversimplified attempt at describing Hinduism:
Hinduism in Bali is so much different from the Hinduism in Mauritius. For a start, they are at different ends of the Indian Ocean but it's actually a mistake to think of Hinduism as being polytheistic. Hinduism is divided into different sects and each sect has their own deity. People pick their favoruite deity to worship.
Also, Sikhism may be another. In Sikhism there are several Gurus and each seems to a built upon the teachings of the previous Gurus. That's if my memory isn't failing.
Jainism could be another. It's so old, much older than Judaism I think, that, like Hinduism, there is no record of a founder. That doesn't mean to said it wasn't founded by a single person but odds are it wasn't.
Here is my oversimplified attempt at describing Hinduism:
Hinduism in Bali is so much different from the Hinduism in Mauritius. For a start, they are at different ends of the Indian Ocean but it's actually a mistake to think of Hinduism as being polytheistic. Hinduism is divided into different sects and each sect has their own deity. People pick their favoruite deity to worship.
Also, Sikhism may be another. In Sikhism there are several Gurus and each seems to a built upon the teachings of the previous Gurus. That's if my memory isn't failing.
Jainism could be another. It's so old, much older than Judaism I think, that, like Hinduism, there is no record of a founder. That doesn't mean to said it wasn't founded by a single person but odds are it wasn't.