Tuya Smart:
Tuya Smart is a global Internet of Things development platform that creates interconnectivity standards to connect brands, OEMs, developers, and retailers across a wide range of smart devices and industries. Tuya offer No-Code development, OTA updates, MCU code creation, and other services. As a result, it's an excellent tool for makers who wish to create something more substantial than a college project.
Home Assistant:
Home Assistant is free and open-source home automation software that focuses on local management and privacy. It is designed to be the core control system for smart home devices. It can be accessed by a web-based user interface, Android and iOS companion apps, or voice commands using a supported virtual assistant like Google Assistant or Amazon Alexa.