
A secure, robust and easy to use business phone system with zero upfront costs.
Our all-inclusive Hosted PBX comes with over 40 enterprise-level features plus Tierzero's unparalleled customer service and support.

Tierzero mobile business phone
Turn your iPhone or Android device into a fully-featured business phone so you can bring your office with you anywhere.

Dedicated business Internet service
Tierzero has been providing dedicated Internet to businesses since 1997. We offer a variety of bandwidth options and media depending on your needs and what’s available at your location. From T1 to Fiber, Ethernet over Copper and Fixed Wireless; we got you covered.
OUR NO
HASSLE
PROMISE
At Tierzero we focus on one goal – delivering “no hassle” phone and Internet to Southern California businesses. We insist on making sure every single client is not just satisfied but happy. We know that your expectations are our responsibility.
Tierzero has grown and prospered mostly by word of mouth. Our customers don’t recommend us for empty slogans or mission statements. They do because they know the power of having a vendor that’s got their back.
If you are considering new service or changing your existing service. Give us a call. You'll be glad you did!

These businesses rely on Tierzero...
... so can yours
People Tierzero
Focused. Professional. Disruptive.
Tierzero began over 20 years ago as an effort to disrupt the telecommunications industry, so we understand the frustration when it comes to dealing with the big phone companies. We believe it's our job to make the lives of business owners and IT managers less complicated and deliver an elegant solution that works with the least amount of hassle.