Kaper was appointed following a competitive pitch and replaces Kazoo. The brief covers Plusnet’s press office plus creative brand building and social content.
Kaper’s sister agency Karmarama already acts as Plusnet’s creative agency.
Sarah Pepworth, head of marketing at Plusnet, said: "Kaper demonstrated real creativity and vision, offering fresh, insight-driven ideas to match our brand ambitions. Its collaborative relationship with Karmarama will enable us to build an integrated campaign strategy to achieve fame and cut-through for the business."
Chris McCafferty, founder of Kaper, said: "Plusnet set us an exciting brief to attract new audiences and build an even stronger relationship with its existing customer base. We admire its ambitious yet down-to-earth approach and are looking forward to working with both the in-house team and our sister agency Karmarama to create a modern and integrated PR strategy."
Plusnet has received some negative press in recent weeks after announcing plans to raise prices from September, reducing the upload speed on its Unlimited Fibre package and replacing its 24/7 phone support line with a service that operates from 7.30am to 10.30pm.