The Bangalore airport outlet recently served a distinguished visitor - Infosys founder N.R. Narayana Murthy.

Hatti Kappi sells between 30,000 and 50,000 cups of coffee a day. It employs about 120 people, and buys its beans from Karnataka's Chikmagalur district. Starting with a modest investment of Rs 1 lakh, it has gradually increased its investment to Rs 2 crore. The chain had a turnover of about Rs 7 crore in 2011/12.

Sunalini Menon, coffee expert and founder of Bangalore-based coffee consulting firm Coffeelabs, says Hatti Kaapi follows all the rules for making good filter coffee. "The consumer gets both quality and quantity at a low price," she says. "And they are expanding slowly and cautiously."

12. Edutor Technologies

Location: Hyderabad

Business: Digital learning

Founded in: August 2009

Led by: Ram Gollamudi, Co-founder and CEO 

Cool quotient: An interactive solution for school students and teachers using touch screen devices