Why OnSIP Business Phone System?

We provide a phone system that is user-friendly, reliable, scalable and secure from a vendor that you can trust — and that won't tie you to a long-term contract.

Unmatched reliability

We get that you need your phone system to work—all day, every day. That's why we designed a patented, geographically distributed cloud that allows for optimal call routing, with 100% redundancy, 99.99% latency free service, and massive scalability.

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Total security

Our apps provide end-to-end encryption on all calls, so no unauthorized person can access your meetings. We're also certified HIPAA and PCI compliant. We safeguard our customers' data by building, maintaining, and monitoring a secure network while meticulously following security best practices.

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Expert support

Our friendly, United States-based customer success team is here to help! From setup to maintenance to problem-solving, our award-winning pros provide exceptional service to manage your every business VoIP need.

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Trusted by over 100,000 customer accounts

Lucas Acosta


CEO, Foojee

I loved OnSIP's approach of offering an easy-to-use cloud service that works with any SIP phone. ... It’s clear they stay focused on what customers want.

Brian Frias


Technology Manager, Masterfit Enterprises

I congratulate the ones that do the hiring [at OnSIP] for finding a team of awesome and knowledgeable employees.

Erin Hendricks


Administrative Coordinator, Gauge Interactive

With every call, they’ve been patient, friendly, and incredibly helpful ... I would recommend OnSIP based on their customer service alone.

Anoush D’Orville


President, ADVisory

You have to search long and hard for a service that comes near to OnSIP in terms of friendly and responsive support, pricing, and reliability.

Let's talk

Send us a few details and we’ll get in touch to discuss specific needs.

or call us directly at 800-801-3381