Sandbar Raises $23 Million to Build a Wearable Conversational Interface

Sandbar, a voice ring and conversational interface creator, has raised $23 million in a Series A funding round from Adjacent and Kindred Ventures, following a $10 million seed round in early 2025 and a $3 million pre-seed round in early 2024, bringing total funding to $36 million.

Stream, Sandbar's first product, is a private voice ring and conversational interface. Stream pairs Stream Ring, a private voice ring with a touchpad, personal mic, and haptic feedback, with a conversational interface that helps capture notes, talk through ideas, retrieve web info, and take actions on the go.

Stream is designed without an identity of its own. It remembers what users share, listens only when users hold the button to speak, even at a whisper, and uses multiple AI models to organize, respond, and search the web in real time.

This spring, Sandbar will launch a closed beta to refine software interactions and introduce Inner Voice, a feature that responds in a voice personalized to the user.

"We believe in self-augmentation in an agentic world," said Mina Fahmi, co-founder and CEO of Sandbar, in a statement. "With the right interface, everyone should be able to develop ideas and get things done wherever they are, with the speed, privacy, and ease of thinking."