Crest pitched against Edelman and Lexington for the contract with the Westminster Independent Inquiry into Child Sexual Abuse.
The inquiry, overseen by New Zealand former High Court Judge Lowell Goddard, was set up by Home Secretary Theresa May in February 2015. Its remit is to look at 12 separate cases of child sex abuse in areas including Rochdale, Nottinghamshire and Lambeth in London, as well as abuse in the Roman Catholic and Anglican churches and on the internet.
The new brief went out to tender to find an agency to oversee a comms programme across England and Wales. The nine-month contract will see Crest deliver a major public awareness campaign designed to encourage victims and survivors of child sexual abuse to come forward to share their story.
Earlier this month the inquiry heard allegations that the late Lord Janner abused children over a period of more than 30 years.
Crest was set up in 2011 by Gavin Lockhart-Mirams, a former adviser to Prime Minister David Cameron.