Sandbar’s Stream AI Ring Aims to Be the ‘Mouse for Your Voice’
The market for voice-controlled AI devices is rapidly expanding, with new gadgets like cards, pendants, and bracelets designed for communication, productivity, and personal growth. Now, a new startup called Sandbar, founded by two former Meta interface designers, is entering the space with its own take: an AI-powered ring named Stream.
Dubbed a “mouse for your voice,” the Stream ring lets users take notes, interact with AI, and control their music. The founders, Mina Fahmi and Kirak Hong, bring extensive experience in human-machine interface design from companies like Kernel, Magic Leap, Google, and CTRL-Labs, which was acquired by Meta.
The concept for Stream was born from Fahmi’s personal frustration. He found that pulling out a phone to record thoughts in a notes app was disruptive, especially when ideas struck during walks or commutes. He wanted a discreet way to capture ideas without having to speak aloud for everyone to hear. This led to the development of a ring designed to record thoughts the moment they occur.
Worn on the index finger, the ring features microphones and a touchpad. To record, the user simply presses and holds the touchpad. The microphones are disabled by default for privacy and are sensitive enough to accurately pick up and transcribe even a whisper into the companion iOS app.
The app includes an AI chatbot that interacts with users as they record their thoughts, helping to organize them into individual notes. It also provides an overview of conversations and notes from previous days or weeks. A unique personalization layer allows the AI assistant’s voice to mimic the user’s own.
For use in crowded spaces, users can pair the ring with headphones for private conversation. Without headphones, a haptic buzz confirms a note has been successfully recorded. Beyond voice, the ring’s flat surface also functions as a media controller for music playback.
Sandbar has opened pre-orders for the Stream ring starting at $249, with shipments scheduled for next summer. A “Pro” subscription, which will cost $10 per month after a three-month free trial for pre-order customers, offers unlimited chats, notes, and early access to new features.
The company emphasizes user control and data privacy, with encryption for all stored and transmitted data. Sandbar also plans to support data export to third-party apps like Notion, rejecting the concept of a “walled garden.”
The startup has secured $13 million in funding from investors like True Ventures, who were impressed by the practical and discreet form factor after being skeptical of other AI hardware demonstrations.
Sandbar now faces significant competition in the crowded AI hardware space, where many companies are exploring the ring form factor. While other ventures like Humane and Rabbit have struggled to achieve mass-market success, Sandbar aims to prove that its ring offers genuine convenience and value that pendants or bracelets cannot match, positioning itself not as an AI companion, but as a simple interface for expressing ideas.