Hi, Shivoham

OK,

Let's say there are 10 companies from different areas, such as education, clothing store, transport etc.

1 - Can each of these areas be configured different?

2 - These companies do not need to know about the others, does nothing interfere in the configuration of one company with another?

3 - Are they totally independent?

4 - Is it safe?

5 - Is it better to do this in the cloud or is there another way to create this platform?

Hello Ricardo, 

Refer this document, 

/https://www.odoo.com/slides/slide/multi-company-1005