Apple has released an open-source version of its HomeKit Accessory Development Kit (ADK), following news that it is joining a new industry effort to create an open standard for smart home devices.

homekit devices
On Wednesday, Apple, Amazon, Google, and the Zigbee Alliance announced the formation of a new working group that plans to develop and promote the adoption of a new IP-based connectivity standard for smart home products, with a focus on increased compatibility, security, and simplified development for manufacturers.

In a news post on its developer website, Apple said the release of the open-source ‌HomeKit‌ ADK is designed to accelerate development of the new universal smart home standard:

To accelerate the development of the new universal standard, Apple is open-sourcing portions of its HomeKit Accessory Development Kit (ADK). HomeKit has grown to become the most extensive, powerful and secure smart home platform available on more than a billion iOS and iPadOS devices. Built from the ground up to protect customer data, HomeKit and the Home app use innovative privacy technologies and techniques to help minimize the amount of data anyone — including Apple — can access as well as powerful security features that protect personal information. By open-sourcing its HomeKit technology, Apple will be helping to jump-start the initiative and ultimately deliver an even better experience to customers.

The release of the ADK means anyone can start developing non-commercial smart home accessories and even build ‌HomeKit‌ devices for their own home, while accessory manufacturers can use it to test products before officially joining the ‌HomeKit‌ MFi program, which can be a time-consuming process, not to mention an expensive undertaking.

Apple says it will contribute its ‌HomeKit‌ Accessory Protocol to the new consortium, and noted that anyone planning to sell HomeKit-compatible accessories must use the commercial version of the kit supplied by the Apple MFi program. The company also confirmed that existing ‌HomeKit‌ accessories will remain compatible with the new protocol when it's eventually released.

To access the ‌HomeKit‌ Open Source ADK, visit www.github.com/apple/HomeKitADK.

Top Rated Comments

Janschi Avatar
78 months ago

Well that’s good.. I think? I’m not a developer: can anyone explain how will this help the platform?
The companies decided to come up with a standard protocol to make all smart home devices compatible with any OS. This is really great news tbh.
It’s similar to the USB C and emoji consortium to set standards.
Score: 5 Votes (Like | Disagree)
redpandadev Avatar
78 months ago
Sounds like the open standard, once available, will be largely based on HomeKit. If true, that is a HUGE win for Apple.
Score: 3 Votes (Like | Disagree)
Westacular Avatar
78 months ago

The company also confirmed that existing HomeKit accessories will remain compatible with the new protocol when it's eventually released.
No, they didn't: What Apple said was
Existing HomeKit accessories will continue to work after the new protocol becomes available since Apple plans to continue to support HAP for communication with smart home accessories in its ecosystem.
i.e., existing HomeKit accessories will continue to work using the existing HomeKit Accessory Protocol even after the new Connect Home over IP protocol is finalized and adopted. Apple's saying both protocols will be supported by their devices. Apple is not saying that random HomeKit accessories will suddenly learn how to speak the new protocol.
Score: 3 Votes (Like | Disagree)
Applebot1 Avatar
78 months ago
Open standards is best for consumer. Good move; let’s see how it pans out ;)
Score: 2 Votes (Like | Disagree)
dewalt Avatar
78 months ago
This may mean homebridge will be recoded, but it should be a better outcome.
Score: 1 Votes (Like | Disagree)
Smith288 Avatar
78 months ago

This may mean homebridge will be recoded, but it should be a better outcome.
This is right in the homebridge's wheelhouse. Im excited
Score: 1 Votes (Like | Disagree)

Popular Stories

iOS 26

15 New Things Your iPhone Can Do in iOS 26.2

Friday December 5, 2025 9:40 am PST by
Apple is about to release iOS 26.2, the second major point update for iPhones since iOS 26 was rolled out in September, and there are at least 15 notable changes and improvements worth checking out. We've rounded them up below. Apple is expected to roll out iOS 26.2 to compatible devices sometime between December 8 and December 16. When the update drops, you can check Apple's servers for the ...
Intel Inside iPhone Feature

Apple's Return to Intel Rumored to Extend to iPhone

Friday December 5, 2025 10:08 am PST by
Intel is expected to begin supplying some Mac and iPad chips in a few years, and the latest rumor claims the partnership might extend to the iPhone. In a research note with investment firm GF Securities this week, obtained by MacRumors, analyst Jeff Pu said he and his colleagues "now expect" Intel to reach a supply deal with Apple for at least some non-pro iPhone chips starting in 2028....
Photos App Icon Liquid Glass

John Gruber Shares Scathing Commentary About Apple's Departing Software Design Chief

Thursday December 4, 2025 9:30 am PST by
In a statement shared with Bloomberg on Wednesday, Apple confirmed that its software design chief Alan Dye will be leaving. Apple said Dye will be succeeded by Stephen Lemay, who has been a software designer at the company since 1999. Meta CEO Mark Zuckerberg announced that Dye will lead a new creative studio within the company's AR/VR division Reality Labs. On his blog Daring Fireball,...
ive and altman

Jony Ive's OpenAI Device Barred From Using 'io' Name

Friday December 5, 2025 6:22 am PST by
A U.S. appeals court has upheld a temporary restraining order that prevents OpenAI and Jony Ive's new hardware venture from using the name "io" for products similar to those planned by AI audio startup iyO, Bloomberg Law reports. iyO sued OpenAI earlier this year after the latter announced its partnership with Ive's new firm, arguing that OpenAI's planned "io" branding was too close to its...
iOS 26

Apple Seeds iOS 26.2 and iPadOS 26.2 Release Candidates to Developers and Public Beta Testers

Wednesday December 3, 2025 10:33 am PST by
Apple today seeded the release candidate versions of upcoming iOS 26.2 and iPadOS 26.2 updates to developers and public beta testers, with the software coming two weeks after Apple seeded the third betas. The release candidates represent the final versions of iOS 26.2 and iPadOS 26.2 that will be provided to the public if no further bugs are found during this final week of testing....
iphone air camera

iPhone Air's Resale Value Has Dropped Dramatically, Data Shows

Thursday December 4, 2025 5:27 am PST by
The iPhone Air has recorded the steepest early resale value drop of any iPhone model in years, with new data showing that several configurations have lost almost 50% of their value within ten weeks of launch. According to a ten-week analysis published by SellCell, Apple's latest lineup is showing a pronounced split in resale performance between the iPhone 17 models and the iPhone Air....
iPhone 17 Pro Cosmic Orange

iPhone 17 Pro Lost a Camera Feature Pro Models Have Had Since 2020

Thursday December 4, 2025 5:18 am PST by
iPhone 17 Pro models, it turns out, can't take photos in Night mode when Portrait mode is selected in the Camera app – a capability that's been available on Apple's Pro devices since the iPhone 12 Pro in 2020. If you're an iPhone 17 Pro or iPhone 17 Pro Max owner, try it for yourself: Open the Camera app with Photo selected in the carousel, then cover the rear lenses with your hand to...
ios 18 to ios 26 upgrade

Apple Pushes iPhone Users Still on iOS 18 to Upgrade to iOS 26

Tuesday December 2, 2025 11:09 am PST by
Apple is encouraging iPhone users who are still running iOS 18 to upgrade to iOS 26 by making the iOS 26 software upgrade option more prominent. Since iOS 26 launched in September, it has been displayed as an optional upgrade at the bottom of the Software Update interface in the Settings app. iOS 18 has been the default operating system option, and users running iOS 18 have seen iOS 18...
iPhone 17 Pro Cosmic Orange

10 Reasons to Wait for Next Year's iPhone 18 Pro

Monday December 1, 2025 2:40 am PST by
Apple's iPhone development roadmap runs several years into the future and the company is continually working with suppliers on several successive iPhone models at the same time, which is why we often get rumored features months ahead of launch. The iPhone 18 series is no different, and we already have a good idea of what to expect for the iPhone 18 Pro and iPhone 18 Pro Max. One thing worth...
maxresdefault

iPhone Fold: Launch, Pricing, and What to Expect From Apple's Foldable

Monday December 1, 2025 3:00 am PST by
Apple is expected to launch a new foldable iPhone next year, based on multiple rumors and credible sources. The long-awaited device has been rumored for years now, but signs increasingly suggest that 2026 could indeed be the year that Apple releases its first foldable device. Subscribe to the MacRumors YouTube channel for more videos. Below, we've collated an updated set of key details that ...