AI notetaking devices have surged in popularity over the last few years, with everything from credit-card-sized gadgets to pendants, pins, and even transcription earbuds promising to capture meetings and turn them into summaries and action items. Now, a new wave of wearables—especially rings—are betting that people will want to capture stray thoughts and ideas just as easily. One company chasing that bet is Sandbar, the startup behind the private voice ring Stream, which has raised $36 million to date, including a $23 million Series A led by Adjacent and Kindred Ventures.

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