Founded: 1965
Location: Kings Cross, London
Staff: UK: 90; global: 150
Creative roles: 30%
Founded in London seven years before Pentagram – "exact date unknown, it was the 60s!" grins marketing director Krisana Jaritsat – Omnicom-owned Wolff Olins has the longest heritage of any of the agencies on our list, and is still widely respected by its peers.
"It's good to get the recognition of friends, but most of all it's a great way to attract new talent," asserts creative director Chris Moody."Perhaps the reason we still feel relevant is because we keep bringing in new people with new ideas."
At its heart is a collaborative spirit and commitment to human-centred design: "The work only works if it works for real people," adds Moody