ToneTag is a deep-tech startup that has developed an encrypted, ultrasound-based protocol that turns ordinary speakers and microphones into secure payment interfaces, eliminating the need for NFC or QR hardware. Its solution is already embedded in point-of-sale terminals, smartphones, smart TVs, wearables and other IoT form factors, allowing users to pay or authenticate with sound. The platform currently handles more than 25 million transactions every day, processing over US$3 billion in monthly payment volume. ToneTag’s technology stack is protected by a portfolio of international patents and is designed to work on commodity audio hardware, simplifying deployment at scale. Looking ahead, the company plans to launch one of the world’s first edge-AI-powered, payment-capable modules engineered in India for global markets. These intelligent modules will extend ToneTag’s proximity-based payments into a new class of edge devices and drive global adoption. The company’s growth has been backed by multiple institutional investors, enabling continuous product development and international expansion.

Total raised

$5M

Funding rounds

2

Latest round

Equity

Latest activity

Feb 2026