Oga : India''s fastest growing budget Hotel, Home stay, Guest House, Service Apartment chain. Online economy hotels for affordable stay. ogabnb.com OGA is India`s fastest growing hospitality companies. OGA is the accommodation partner of Indian Railways (IRCTC) and Department of Tourism. OGA has also signed an MOU with Department of Forest to promote Eco Tourism facilities in India. OGA has accommodation partner network in 102 cities, having more than 1,500 Hotels, Home Stays, Service Apartments, Guest Houses and Eco Tourism facilities.