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 5 years running.

2023 customer service award
2023 Excellence in Customer Service Award
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Simple, secure, adaptable

  • Easy to set up and use
  • Secure, patented technology
  • Scales with your business
  • Can be used in a HIPAA compliant way
  • Bring your own device
  • Connect with over 150 countries
  • Free onboarding services included
  • 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. You’re always in control!

View our plans
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Customers love us!

And we take their feedback seriously. Listen to how one of our customer’s expectations for a phone provider were far surpassed. You’ll find many others on Trustpilot.

Read some of our success stories

Want more details?

We're sorry--it looks like you are located in a country that OnSIP doesn't service. If you are located in the U.S. or Canada and you received this message, please contact us at (800) 801-3381.