1. Business to customers (B2C): This is fastest growing segment in e-commerce space. Under this model, business concern sells directly to consumers. 

2. Business to Business (B2B): Under the model, business concerns transact with one another through internet. For instance, Snapdeal, Flipkart, Alibaba, Indiamart, Trade India.com etc.

3. Consumer to consumer (C2C): Under this model, customers sell directly to other customers through online classified advertisement or through auction or through mobile or through market places. 

Example, Indian ventures in C2C are Kraftly App (buying and selling anythings) which deals in handmade products of a wide range. Onceagainstore. com is a website that buys preowned women’s fashion products. Other players are Quikr, OLX, ebay, etc.

4. Customer to Business (C2B): This model is reverse to auction model. Products like • automobile, electronic items, furniture and similar product are traded by customer through websites. Naukri.com and Monster.com are examples of Indian companies operating in this domain.

5. Business to Government (B2G): This model envisages selling products and services by business consumer to Government organization. For instance TCS operates the passport application process for the Government of India as part off-line process.