Crowdring is a mobile petition platform that allows organizations to engage citizens in campaigns via free missed calls and SMS blasts. It provides a streamlined user flow for campaigners and participants, and functionality like SMS blasts, user tracking, and integration with voice and messaging services. The platform aims to catalyze mobile organizing globally, especially in emerging economies, by addressing barriers to sustained engagement and scalability that exist with current mobile organizing tools. It has built a prototype and is working with partners to test and build out its mobile tools.