Never heard of those companies.Huh?
1. PayTM
2. Flipkart
3. InMobi, yes it is Indian company.
4. Kony Labs
5. Hike
6. Zoho -- Salesforce tried to acquire them, they refused. They bootstrapped the company without even getting any help from VCs.
There are many many many more.
I can list hundreds of vietnamese software companies as well. For OTT, Vietnamese use Zalo. For search engine, we have coccoc.com, which is the most used website in Vietnam. Does Indian have any domestic equivalent, or you let WhatApp and Google dominate the market?