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Enabling A Seamless Customer Journey

Say Hello to Radius,
The World's Most Advanced Data-Over-Sound SDK.

Packed with the power to increase revenue, reduce costs, improve customer loyalty... and more.

Contactless Authentication
For The Speed of Life

LISNR’s Radius SDK enables proximity verification & contactless transactions, including offline data transmission, for payments and financial service providers, merchants, mobility companies, and other proximity applications worldwide.



Flexibility to support favorable transaction fee and cost structures in payment experiences due to security & control.


Faster and more seamless authentication experiences enabled with the combination of range and experience control.


Flexibility to support encryption, cryptography, key exchange alongside full duplex, multi-channel features, we can enable the most secure transmission method.


Customizable performance range from a few centimeters to many meters with best in class transmission reliability and confirmation.


Our clients have complete control of their data transmission experience based on their transport layer and business model.

Innovation, Inspiration, Collaboration

Fortune 100 companies across millions of devices and use cases worldwide have entrusted LISNR to transmit data over sound and develop break through POCs leveraging LISNR’s global patent portfolio with the earliest filing of any comparable data-over-sound solution.