The Shift Towards Local Control in Smart Homes

On October 20, 2025, a significant outage of Amazon Web Services (AWS) lasted for 15 hours due to a DNS configuration error in a Virginia data center, impacting approximately 1,000 platforms. This incident highlighted the vulnerabilities of cloud-dependent smart home systems, as devices like Amazon Alexa and Ring doorbells became unresponsive, leaving millions of users without control over their smart homes. Similar outages have occurred, such as the June 2025 failure of Sengled's cloud, which left users unable to operate their smart bulbs for several days.

My smart home still works without the internet, and it's all thanks to one app

Most smart home devices rely on cloud servers for functionality, creating multiple points of failure. When a user issues a command, such as turning off a light, the request is sent to the cloud, processed, and then relayed back to the device. This process can take one to three seconds, and if any part of this chain fails, the device may become non-functional. The reliance on external servers means that smart homes are only as reliable as the weakest link in this chain.

My smart home still works without the internet, and it's all thanks to one app

Home Assistant is an open-source home automation platform that operates entirely on local hardware, allowing users to maintain control even during internet outages. It communicates directly with devices using local protocols such as Zigbee, Z-Wave, Thread, and Matter, ensuring that automations and device states are processed on-site. As of May 2025, Home Assistant had reached two million active installations, reflecting a growing preference for local control solutions. The platform is governed by the Open Home Foundation, which emphasizes user privacy and device sustainability.

My smart home still works without the internet, and it's all thanks to one app

The primary benefits of using Home Assistant include enhanced reliability and reduced latency, with response times of 0.2 to 0.4 seconds compared to cloud-dependent systems. Local protocols like Zigbee and Z-Wave create a mesh network that strengthens with additional devices, while Matter allows for local control of compatible devices without mandatory cloud reliance. Users can also build custom sensors using ESPHome, further enhancing local functionality.

My smart home still works without the internet, and it's all thanks to one app

Despite its advantages, transitioning to a local-first setup can present challenges. Users may face a learning curve when setting up Home Assistant, and not all smart devices are compatible with local control. Existing investments in cloud-only ecosystems may necessitate hardware replacements. Additionally, while Home Assistant can manage cloud devices when the internet is operational, remote access requires additional configuration, such as a paid subscription or VPN setup.

My smart home still works without the internet, and it's all thanks to one app

The October 2025 AWS outage underscored the risks of ceding control over home automation to third-party servers. With local control, users retain ownership of their data and are not subject to the whims of cloud service providers. The Open Home Foundation advocates for user autonomy, emphasizing that smart home technology should prioritize privacy and long-term sustainability.

My smart home still works without the internet, and it's all thanks to one app

The repeated failures of cloud-dependent smart home systems have prompted a shift towards local control solutions like Home Assistant. With mature technology and a thriving community, local control is increasingly seen as the most sensible architecture for managing home automation, ensuring reliability, privacy, and user empowerment.

My smart home still works without the internet, and it's all thanks to one app