onoff is the first telecom operator in the cloud!

A revolutionary hybrid operator (combining traditional telecom technologies with advanced OTT services), onoff have built the leading mobile app for enabling multiple phone numbers on a single device. onoff allows users to manage multiple numbers from any country and from one physical SIM card and device and to switch them “on” or “off” with one click: personal, professional, international, temporary and more. They are the only provider to offer world portability, offering users the ability to keep several, international numbers while only paying for one package.

onoff was founded by Taïg Khris, former multi-time rollerblade world champion.

Last metrics

1 billion

SMS messages sent via onoff


active users



“OneRagtime met me in the very beginning and found that what I was building was very different. Nobody understood that at the time, because it was so innovative. OneRagtime not only believed in us but challenged us on many points to help us to grow and refine our business model.”

Taig Khris

CEO & Founder