CIRCUS foundation is an independent think tank based in London UK. Since its formation in 1997 the foundation has undertaken a wide variety of experimental projects exploring how the internet and digital technologies will transform communities, organisations and societies. Rather than publishing pamphlets and articles most of its outputs  are practical. To date CIRCUS has created community organisations, open source development projects, films, photographic exhibitions and one commercial software venture.

Currently the foundation is specifically focused the themes of the virtual corporation and emergent democracy.