Frank PR has won the accounts for crowdfunding platform Angels Den and craft beer subscription service Beer52.com.
Angels Den matches entrepreneurs and investors who receive a stake in fledgling firms.
Beer52.com is a business based on sending its subscribers a handpicked case of eight craft beers on a monthly basis.
Andrew Bloch, Frank PR Group managing director and co-founder, said: "Angels Den is a really exciting, innovative company that makes investment very accessible to its users. Similarly, Beer52.com is an exciting start-up that will revolutionise the way we drink craft beer in the UK."