Adfactors PR | 97,362 followers on LinkedIn. 28 years of service to India Inc. | Adfactors PR, founded in 1997, is India's largest Public Relations firm. A multi-specialist, full-service firm, we serve clients in over 25 industries across 40 cities in India. The clients include some of the largest corporations, conglomerates, financial institutions and trade bodies, as well as a host of bright, young start-ups and unicorns.