The new agency will work across the hospitality sector, offering PR, marketing consultancy, digital and social media management, event production, and business development.
The North London-based agency employs 18 people across five teams in three divisions: restaurants, bars and events, and brands.
KK Communications was founded by Katrina Kutchinsky in 2011.
Anteater Communications opened in 2012 after founder Antony Rettie returned from a role in New York City at Bullfrog & Baum.
Rettie said: "There’s never been a more exciting time to be in communications. At AKA we aim to service every aspect of today’s complex and always-evolving media."
The new agency’s roster of clients includes restaurants Coya and China Tang at The Dorchester, as well as pub group Harcourt Inns and pastry brand Maitre Choux.