Archrival was conceived in 2011 by Claire McCaughan and Lucy Humphrey as a vehicle for procuring unsolicited projects outside of commercial architectural practice and is a not for profit organisation. The formation offers individual architects from different offices the opportunity to explore new ways of participating in architectural thinking and making, in a context which is both not for profit and without a specified client. Archrival is a unique practice formation because it operates in parallel to commercial practice as an extra-curricular venture with a different agenda. Its structure allows a potentially large number of professionals to collaborate on each project, resulting in diverse teams working together in a way that is not otherwise available. The participants, who are often commercial rivals in their standard practice, find a new territory to develop ideas and create work.