Sandbar secures $23M Series A for its AI note-taking ring

Sandbar, a startup founded by former Meta employees, raised $23 million to develop the Stream ring, a wearable device with a microphone that records notes and lets users chat with an AI assistant through a phone app. The ring's microphone is off by default and only activates when users lift their hand to their face, which signals intent for private note-taking rather than recording surrounding conversations.