about

The
MobileSphere
Story

Founded in 2015 and headquartered in Cambridge, Massachusetts, MobileSphere has been at the forefront of mobile communication innovation, from pioneering patented ringless voicemail technology to building a suite of voice, messaging, and privacy tools trusted by over 100,000 companies worldwide. What started as a bold idea has grown into a force that shapes how businesses and individuals connect.

815M+

Messages delivered across all products

3M+

Slybroadcast users worldwide

500K+

SLYNUMBER Users Since Launch

20+ Years

Years of mobile communication innovation

Our
Journey

Here's a look at the milestones that got us here.

April 2003

Slydial was created and pioneered the ringless voicemail technology as the first direct-to-voicemail service, filing a groundbreaking patent that set the industry standard others would follow.

January 2015

Founder and President Toufic Mobarak led the company’s evolution from MobileSphere LTD to MobileSphere LLC, reinforcing its focus on independent innovation, long-term growth, and continued leadership in mobile communications.

March 2015

Slybroadcast was launched, quickly becoming the leading platform for businesses and individuals to deliver ringless voicemail drops at scale, sending over 30 million messages in its first five years and growing into a service trusted by over 3 million users worldwide.

January 2019

SlyText brought two-way web-to-mobile business texting to market, giving companies a simple way to send personalized mass messages directly from their browser, including the ability to text-enable their own landline or VoIP number so messages come from a number their customers already recognize. Since launch, slyText has delivered over 570 million messages, cementing its place as a trusted tool for business communication.

May 2021

SLYGUARD set a new standard in digital privacy by offering military-grade encryption, a no-logs VPN, and a fully anonymous private number across popular messaging platforms like WhatsApp, Signal, and Telegram. SLYTALK further expanded MobileSphere's privacy suite, delivering encrypted calling and messaging so users could connect freely without ever compromising their personal data.

January 2023

SLYNUMBER launched as the only second phone number app to offer real mobile numbers, giving users a fully anonymous, private line that works everywhere and with everything, amassing over 500,000 users since launch.

January 2026

Across all products combined, MobileSphere has delivered over 815 million messages, a milestone that reflects over two decades of innovation in communication.

Our leadership

MobileSphere is led by founder and CEO Toufic Mobarak, a telecommunications entrepreneur with more than two decades of experience building and scaling global mobile communication technologies.

As a veteran telecommunications innovator, he is moving MobileSphere beyond simple connectivity to solve the world's burgeoning mobile identity crisis. 

The future of mobile identity

As people increasingly live and operate across borders, communication systems must evolve to support identity, not just location.
MobileSphere is building the infrastructure that enables individuals to carry their mobile identity wherever they go.