Trillbit is a technology company based in Boston, MA, that develops and licenses a patented Data over Sound (DoS) technology platform. The core technology transmits encrypted digital data between devices using ultrasonic sound waves, requiring only a speaker and a microphone on each device. This approach works offline, is device-agnostic, and supports cross-platform deployments across Android, iOS, macOS, Windows, Python, and embedded systems such as Raspberry Pi. The company offers two primary product lines. Trill Auth is a contactless authentication solution targeting use cases in payment, ticketing, transportation, check-in, and physical access control. It positions sound-based data transfer as an alternative to QR codes and NFC. Trill IoT focuses on IoT and smart device provisioning and troubleshooting, enabling manufacturers to integrate sound-based setup flows into their hardware products. A third product, SoundAuth, is marketed as a passwordless multi-factor authentication solution built on FIDO passkey standards. Trillbit holds FIDO Alliance membership and describes SoundAuth as conforming to FIDO specifications. The technology supports industry-standard encryption protocols including AES, RSA, and TOTP. Trillbit distributes its technology via an SDK, which developers can integrate into their applications. A free tier is available supporting up to 4,000 transactions without a credit card. Partners referenced on the website include Espressif (AIoT platform), Knowles, OYO, Chalo, and Mylorides. Use cases span smart home, industrial IoT, public transit, and hospitality sectors.