eYeka (Listeni/ aj kɑ) is an online crowdsourcing and co-creation platform that allows brands to announce and conduct contests through the Internet. Companies create sets of questions, called "community briefs" or "call-for-entries", to which people can respond to by submitting visual creations. This allows companies to gather creative ideas for marketing or innovation purposes. Participants agree to legal terms and conditions that ensure the confidentiality of projects and transfer intellectual property rights to participating brands.