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

Sandbar, a startup founded by ex-Meta team members Mina Fahmi and Kirak Hong, has generated significant buzz since unveiling its cutting-edge note-taking device, the Stream ring. The company recently completed a $23 million Series A funding round, with investments led by Adjacent and Kindred Ventures. Unlike health-focused wearables like the Oura ring, Sandbar's smart ring is specifically designed for capturing notes. It features a microphone, which remains off by default but can be activated through a flat, touch-sensitive panel located at the top. Users can press this panel to record thoughts, interact with an AI assistant via a mobile app, and manage multimedia functions such as playing or skipping tracks. Notably, the microphone is engineered for proximity usage, requiring users to lift their hands toward their faces for effective note-taking. Fahmi, who previously contributed to projects at CTRL-Labs and Magic Leap, shared that the development of the Stream ring spanned over two years. The startup emerged from stealth mode last year after a successful testing period with friends and early adopters. "The response [to our launch] exceeded our expectations, which is incredibly encouraging," Fahmi remarked to TechCrunch. Many early users expressed their enthusiasm for the product, with the initial pre-order stock selling out quickly, prompting Sandbar to release a second batch to meet demand. Some users reported utilizing the ring for over 50 tasks daily, such as planning meals and presentations. The company anticipates beginning shipments of the smart ring this summer while refining the app experience and expanding the capabilities of recorded notes. Plans are in motion to develop a web platform, enhance user interface design, and decrease response latency in the AI model. Long-term goals include facilitating dynamic workflows that allow users to take actionable steps based on their notes. Fahmi highlighted the startup's focus on integrating conversational interactions into the product, addressing user requests for the AI assistant to clarify incomplete recordings. "We believe that back-and-forth conversation is essential. Unlike typical voice-enabled devices that respond to single commands, Stream excels at handling iterative tasks, aiming for richer, multi-turn conversations," Fahmi explained. Currently, the Sandbar app is exclusively compatible with the Stream ring, but the company is considering making it available for broader use, allowing individuals to take notes without the ring—especially useful when the device is charging or misplaced. With a team of 15 employees hailing from prestigious companies like Amazon, Google, and Apple, Sandbar aims to expand its software and machine learning divisions and enhance its marketing efforts through this new funding round. The market for note-taking hardware is rapidly expanding, with competitors like Plaud creating devices for meeting notes and Pebble planning to launch a budget-friendly $75 ring. Other startups, such as Taya, are taking a luxury approach, designing their products as jewelry to attract a more diverse audience. Nico Wittenborn from Adjacent, who has a history of investing in voice-centric startups, believes Sandbar's Stream ring offers a superior form factor compared to other note-taking devices. He noted that the action of lifting one's hand to take notes signifies a more private use case, setting it apart from other recording devices. Wittenborn also pointed out that many current products seem to cater solely to a niche audience, whereas Sandbar's design is poised for broader acceptance. To date, the startup has successfully raised a total of $36 million, including a previous $13 million investment from True Ventures last November.