The best open source alternative to HomeKit is Home Assistant. If that doesn't suit you, we've compiled a ranked list of other open source HomeKit alternatives to help you find a suitable replacement. Other interesting open source alternatives to HomeKit are: CasaOS and YunoHost.
HomeKit alternatives are mainly Server & VM Management Tools but may also be Automation Tools or Internet of Things (IoT) Tools. Browse these if you want a narrower list of alternatives or looking for a specific functionality of HomeKit.
Open source home automation platform supporting 1000+ devices with local control, powerful automations, custom dashboards, and voice assistant. No cloud required.

Transform your house into a smart home while keeping complete control over your data. This open source home automation platform connects with over 1000 different brands and devices, automatically discovering and integrating them into your network.
Key features that set it apart:
The platform excels at presence detection, using your phone's location to trigger automations when you arrive or leave home. Home Assistant Cast turns any TV into a dashboard display, while NFC tags enable instant automation triggers.
Backed by a worldwide community of developers and DIY enthusiasts, this solution offers enterprise-level functionality without subscription fees or data harvesting. Perfect for tech-savvy homeowners who value privacy and local control over their smart home ecosystem.
Looking for open source alternatives to other popular services? Check out other posts in the alternatives series and openalternative.co, a directory of open source software with filters for tags and alternatives for easy browsing and discovery.
CasaOS is an open-source personal cloud system that makes it easy to set up and manage your own home server

CasaOS is an elegant open-source personal cloud system designed to simplify home server management. With its user-friendly interface and Docker-based architecture, CasaOS makes it easy to:
CasaOS runs on a variety of hardware including Raspberry Pi, Intel NUC, and standard x86 computers. The one-click installer gets you up and running in minutes.
Key benefits:
Whether you're a home server novice or experienced self-hoster, CasaOS provides an accessible way to take control of your personal cloud. Get started today and reimagine your home data center.
Install and maintain your own server with minimal technical knowledge. Host websites, email, cloud storage, social networks, and more for complete digital independence.

YunoHost transforms server management into a simple, accessible experience for everyone. This open-source platform lets you install and maintain your own digital services without requiring deep technical expertise.
Perfect for personal use and small organizations, YunoHost supports a wide range of applications including:
Getting started is straightforward with three simple steps:
Built on technocritical principles, YunoHost champions a decentralized internet with open, interoperable technologies that respect privacy and give users control over their digital lives. The project promotes digital sobriety and hardware reuse, making self-hosting both accessible and environmentally conscious.
Whether you're looking to escape big tech surveillance, reduce subscription costs, or simply gain control over your digital infrastructure, YunoHost provides the tools to garden your own piece of the internet.