21k is a digital solutions company that helps transform innovative ideas into digital products. They build platforms, systems, and apps to manage cities and make them smarter. One such platform, S4C, monitors incidents in real-time and was used at the Olympics in Rio de Janeiro. Collaris is a web app that maps crimes reported by users in Rio de Janeiro in real-time. 21k also works with virtual reality technologies and built an app called uView 360 that allows users to watch 360-degree videos on their phones. Additionally, they create affordable internet of things solutions like Hubot, a home automation kit that controls devices via a mobile app.