Sandbar secures $23M Series A for its AI note-taking ring
Sandbar aims to ship the Stream, which can be used to take notes, chat with an AI assistant, and for media playback, this summer.

TL;DR
- Sandbar, founded by ex-Meta employees, raised $23 million in Series A funding led by Adjacent and Kindred Ventures.
- The Stream ring is designed for note-taking and AI assistance, not health tracking.
- It features a microphone activated by a touch panel, allowing users to record notes, chat with an AI, and control media.
- The ring's mic is tuned for proximity, requiring the user to bring their hand to their face to record.
- Sandbar plans to start shipping the Stream ring this summer, focusing on app experience and enabling agentic workflows.
- The company aims to implement conversational exchanges for more iterative tasks and is considering opening app access to non-ring owners.
- Sandbar has raised a total of $36 million to date and plans to expand its software and machine learning teams.
- Investors see Sandbar's form factor as advantageous for private note-taking and widespread adoption.