Willow: the fastest and most private open source voice assistant
Hey HN! Voice assistants like Amazon Alexa and Google Home have sold hundreds of millions of devices. Unfortunately, they come with less-than-ideal things like an always on microphone (doing who knows what), data collection, and limited integration options. Echo devices especially also end up being advertising billboards you pay for and install in your own home. No thanks, I've already heard of the Barbie movie... Willow is an open source hardware and supporting software voice assistant platform. For $50 Willow hardware (from Espressif) is competitive with commercial products in every regard…
Willow: the fastest and most private open source voice assistant launched on October 12, 2023 with 12 votes, #1,437 of 4,393 launches that month and more than 75% of that year's launches. The site was still online in September 2026, 3 years on.
In plain words
Willow is an open source voice assistant platform built on affordable hardware that runs locally without cloud dependency. Designed for users concerned about privacy and data collection, it offers faster performance than commercial alternatives like Alexa while supporting integrations with home automation systems. The $50 hardware is self-hosted, eliminating always-on microphones and advertising, and provides REST API support for customization and third-party connections.
written from the facts on this page · September 2026
From the sources
A Practical, Open Source, Privacy-Focused Platform for Voice Assistants and other Applications
Willow is an ESP IDF based project primarily targeting the ESP32-S3-BOX hardware family from Espressif. Our goal is to provide Amazon Echo/Google Home competitive performance, accuracy, cost and functionality with Home Assistant , openHAB and other platforms. 100% open source and completely self-hosted by the user with "ready for the kitchen counter" low cost commercially available hardware. FAST - Response times faster than Alexa/Echo or Google Home. From end of speech to action completed in 500ms or less. If you're curious how it's so fast (and accurate) you can watch the technical deep dive . ACCURATE - High wake word accuracy, low false activation, and speech recognition powered by our…from heywillow.io
In the maker’s words, at launch
Hey HN! Voice assistants like Amazon Alexa and Google Home have sold hundreds of millions of devices. Unfortunately, they come with less-than-ideal things like an always on microphone (doing who knows what), data collection, and limited integration options. Echo devices especially also end up being advertising…
Does a similar job
all alternatives →
Willow – Open-source privacy-focused voice assistant hardware2023 · github.com · ▲581As the Home Assistant project says, it's the year of voice! I love Home Assistant and I've always thought the ESP BOX[0] hardware is cool. I finally got around to starting a project to use the ESP BOX hardware with Home Assistant and other platforms. Why? - It's actually "Alexa/Echo competitive". Wake word detection, voice activity detection, echo cancellation, automatic gain control, and high quality audio for $50 means with Willow and the support of Home Assistant there are no compromises on looks, quality, accuracy, speed, and cost. - It's cheap. With a touch LCD display, dual…
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