The agency, led by former Labour consultant Luke Bozier, will deploy a combination of campaign websites, email and social media tools to boost awareness and raise funds for Dr Ashraf Ghani, Afghanistan's former finance minister.
Red Narrative will target the 500,000-strong Afghani expatriate population in the West, which numbers 45,000 in the UK alone.
Ghani has already enlisted legendary American political consultant James Carville as his campaign strategist.