Espressif Systems has just released ESP RainMaker Neo, providing a complete device-to-cloud-to-phone app stack, including the cloud backend, firmware SDK, firmware examples, phone app SDK, and reference phone app. If the name sounds familiar, it’s because it’s essentially the open-source version of ESP RainMaker cloud service introduced in 2020. Both are still built on AWS Serverless architecture, but while ESP RainMaker, now known as ESP RainMaker Classic, is managed by Espressif, ESP RainMaker Neo is hosted on the customer’s own AWS instance(s), providing more flexibility and control over the cloud architecture. While the company has made efforts to keep the same hybrid mobile app SDK and similar device-side APIs, RainMaker Neo is a new implementation with a different cloud architecture from ESP RainMaker Classic. That means existing ESP RainMaker Classic deployments cannot be directly migrated to Neo, and the open-source implementation is only recommended for new deployments.