Resin.io is an Internet of Things (IoT) platform that does one thing and does it well: it deploys containers onto devices. Developers use a software as a service (SaaS) portal to manage devices and assign applications, defined by Dockerfiles, to them. The platform can build containers for various hardware types and deploys the images over the air. For the containers, Resin.io uses balena, an engine based on the Moby framework created by Docker. The platform is still under development, has some rough edges and lacks some features (e.g., working with private registries), but the current feature set, including the option to ssh into a container on a device from the web portal, points toward a promising future.