A phone system you can count on

For nearly 20 years, we’ve offered business communications technology with unmatched reliability, security and customer service.


Trusted by over 100,000 businesses

United-Rescue-Alliance ArsTechnica iHeartMedia PATH-1

Award-winning support from real humans)

With our call center based in the USA, our team is here whenever you need us - no chatbots, no complications. That’s why we’ve won the Excellence in Customer Service Award by Business Intelligence Group for 4 years running

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Simple, secure, adaptable

  • Easy to set up and use
  • Totally secure (HIPAA and PCI compliant)
  • Scales with your business
  • Device agnostic
  • Connect with over 150 countries
  • Always up, always on
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Pay your way

You don’t want to be tied to a long-term contract? No problem - pay per month. You’d rather commit to an extended period? We’ll make it happen. Want to change plans? Go ahead. You’re always in control!

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Don’t take our word for it

Without satisfied customers, we are nothing. We take customer feedback very seriously. Here’s one customer’s point of view, and you’ll find many others on Trustpilot.

Read some of our success stories
4.3 510 reviews

Painless Migration.

Clear communication and timelines, zero hitches porting numbers over. Made it easy to convert from onprem PBX to cloud hosted VoIP service. Planning on implementing at other locations using OnSIP due to this experience.


Easy to use.

I have used OnSIP for over 10 years and have to say this is the easiest most robust VoIP service out there. I used their system with 5 employees or 50 with the same ease.

David Kretch
From the time I found out that my small business needed a new phone system to the time that we were up and running with OnSIP I could not have asked for a better transition. I came into some hardware problems which were solved by my rep who put in several hours of troubleshooting to leave me very satisfied. 
Always amazing customer support. My favorite thing about OnSIP. Customer service won't quit until your problems are solved. It's amazing. Thank you so much.
Wissam Zalzali


Been with OnSIP for 8 years now and must say I am glad I connected with them.

Chris Kelly
From planning to implementation and support, I've been very happy with our experience with OnSIP. I felt well supported every step of the way. Pricing is very competitive as well! I wholeheartedly recommend!
Andy Loyd
Great VoIP system that works seamlessly on a physical phone, MacBook, and the OnSIP App on my iPhone and iPad. Easy to configure for user settings.
Stewart McMillan

Excellent Support.

You have amazed me every time I have needed help day or night holiday or weekend. Your tech support is excellent.

Tim C.
VERY satisfied customer for almost 2 years. Great product, great service. Knowledgeable LIVE support like this is unheard of these days. Amazing.
Managing this VoIP system is easy and intuitive. I felt like an expert after a few days. When I do need help, their staff is awesome. If they don't have an answer immediately, I get one within an hour or so. It works with several different phone manufactures which gives you great flexibility with what equipment you use. I couldn't be happier with the system.

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