Flaherty left the position for which she was originally poached at MoneySuperMarket to set up her own agency in May.
BrandContent will specialise in content for the financial services industry that will combine the work of digital marketing specialists with journalists.
Flaherty told PRWeek that she had been contemplating the decision for some time. She said: "I saw a gap in the market – my experience of content agencies creating content was that the quality wasn't there. What you want is national publications and that level of journalist to be writing for your brand."
BrandContent currently has a team of four including Flaherty, with plans to grow. Flaherty will be using her expertise in social media to consult clients on how they choose to communicate.
She said: "The recent FCA social media consultation published in August has stirred quite a debate in the industry because financial services want to be given more freedom from the regulator to be creative but feel bound by the regulatory shackles."
Since her departure, MoneySuperMarket has restructured its PR and content teams. Dan Plant was promoted to head of PR and content in June, with Paul Lawler as deputy head of PR.