Next Fifteen Communications is merging the Asia-Pacific units of Text100 and Bite to create a 300-member operation with offices in China, India, Malaysia, Singapore and Australia.
CEO Tim Dyson called the combination a "world-class regional business" that had "comparatively little overlap" between the two parties.
He said the integration strengthens client offering across multiple sectors and provides more career opportunities.
Anne Costello, currently Text100 regional director of APAC, and Paul Mottram, Bite's existing sector chief, will report to Aedhmar Hynes.
David Ketchum, Bite’s APAC president and founder of Upstream Asia, is leaving after a transition period.
Clients affected by the merger, which will be carried out during Sept.-Dec. are Hong Kong Disneyland, Standard Chartered, Haagen-Dazs, Qatar Airlines, Cadbury, Suzuki, TripAdvisor, Cisco, IBM, Expedia and Peroni.