BrewDog hired Manifest in 2010 after a competitive pitch. The agency will continue to work on international PR for BrewDog's Equity for Punks crowdfunding programme and a UK project to launch BrewDog co-founder James Watt's book.
The brand has been a prominent player in the huge rise in interest in craft beer in recent years. In 2010 BrewDog had 39 staff – this had increased to 358 last year, and in the same four-year period its output increased sixfold to reach nine million litres in 2014.
The Romans will now be responsible for media relations, stunts, bar openings, beer launches and BrewDog's Equity For Punks crowdfunding programme.
New bar launches are planned in the UK and across Europe, with openings in Rome, Brussels and Stockholm later this year.
James Watt, co-founder at BrewDog, said: "We’re psyched to be working with The Romans; their ideas put mischievous smiles on our faces. We’re already plotting some epic bar launches, insane Equity for Punks activity and unprecedented beer announcements – watch this space."
Joe Sinclair and Misha Dhanak, founders of The Romans, added: "The BrewDog guys make incredible beer that we love as well as having a serious track record of genuinely disruptive work. We’re looking forward to never having to float a giant bottle of Punk IPA down the Thames."
Alex Myers, founder and managing director of Manifest, said: "We are very proud of the work we've done and continue to do with BrewDog. It has been a privilege to build the brand strategy and tone of voice from scratch for such an incredible brand, managing all of its external comms for over five years now."
"But the time has come to pass the baton of retained work to The Romans and free ourselves up to work on other exciting campaigns in the drinks industry, while still maintaining our links with BrewDog for bigger creative projects and ongoing international work around Equity for Punks."