Scribbler counts among its launch clients Honda UK, Honda Motor Europe, Fubra, Traackr and SEOptimise.
The launch comes after Leonard recently returned to agency-side as a freelancer, following his year at Three on a maternity cover contract.
Previously he was a co-founder and director of PR agency Brazil, with clients including 118 118, Honda UK, GfK NOP and Swiftcover.
Leonard said: ‘In an industry going through a huge transition as the lines between "offline" and "online", and "bought" and "earned" coverage remain increasingly blurred, demand for good old fashioned traditional media coverage remains. Social and digital are a key part of the mix, but my focus is on column inches, earned not paid for, generated by a small and senior team with the highest standards.’
Leonard has been in the industry for 15 years, starting out a agency Le Fevre Communications in 2001, working for clients including BT and Dixons Group.