Our Story

OnSIP delivers powerfully simple unified communications services to more than 100,000 customer accounts. We’re proud to provide the benefits of an on-demand phone system without the high cost, burden, and inflexibility of traditional phone systems. We also offer APIs for developers to rapidly and affordably build voice, video, and messaging applications themselves.

Sometimes we are asked, “Who is Junction Networks?” Junction Networks is our founding company name. OnSIP is our service.

An Uncommonly Good Phone Company

At OnSIP, we know that your phone system isn’t top of mind, but we also get that you need it to work—all day, every day. That’s why we provide hassle-free communication services that let you forget about your phone system and get on with the business of connecting with your customers.

We believe that our customers deserve better than the bloated features, complex pricing, and outdated thinking that traditional VoIP companies offer. So we’ve made it our mission to provide creative yet straightforward solutions—like our contract-free VoIP plans, click-to-call website chat, and customizable developer tools—to help you streamline your workday.

It’s our business to help simplify yours, and our customer success professionals are here to get you where you want to be. From setup to maintenance to problem-solving, our award-winning team is at the helm, providing exceptional service to manage your every business VoIP need. Our uncommonly good phone company proudly provides uncomplicated products and outstanding customer support to businesses just like yours.

Our Customers

We believe that our customers are the most important part of our company, which is why we’re laser-focused on building products that help facilitate your workday. Our customers represent every industry imaginable—education, finance, health care, legal, real estate, and technology, to name a few—and we’re proud to say that more than 100,000 accounts have entrusted us with their phone service.

Our small business customers and partners want user-friendly, reliable products and services delivered by a company they trust. These core principles inform every part of our business, from the products we build to our customer relationships. We’re a small business too, so we understand what matters most to you, and we treat our customers the way we like to be treated.

Read our customer reviews on TrustPilot

Our Culture

OnSIP’s employees are the lifeblood of our company, and with our cofounders, we’ve created an inviting, collaborative, and inclusive workplace for the last 15 years. Working together, we dream big and innovate incessantly—no idea is too small, and no opinion goes unheard. Our best products get made when we ideate as a team and when everyone takes a hands-on approach to product development. We’re proud to work for OnSIP, we’re passionate about technology, and we’re excited to pioneer the next groundbreaking solutions to help businesses communicate better.

Our Founders

Mike Oeth

Cofounder & CEO

Mike graduated from Harvard College in 1991 with a degree in Economics and went to work for a software company, FactSet, based in Greenwich, CT. Since then, he has held varying leadership positions at technology companies, including VP of Sales at Interport Communications, VP of Product Development at RCN, CTO at LivePerson, and National Account Manager at AboveNet. Mike has received a Gold Stevie® Award in the Executive of the Year - Telecommunications category at The 11th Annual American Business Awards. He has also been listed as the #5 most influential person in VoIP by GetVOIP.com.

Rob Wolpov

Cofounder & President

Rob holds his M.B.A from Columbia University. He received a B.S. from the Wharton School of Business at the University of Pennsylvania. He began his career as a software engineer for the Frustum Group, a provider of leading foreign exchange trading software. He has planned and launched multiple technology ventures including Nemex, Inc. and ASP Junction, which was purchased by LivePerson, Inc. Before forming Junction Networks, Rob worked as a consultant in the Financial Services practice for IBM Business Consulting Services, advising some of the largest financial institutions today.

John Riordan

Cofounder & CTO

John holds a B.S. in Computer Science and B.S. in Cognitive Science from MIT. After school, he spent a few years as a software engineer on Wall Street before jumping into internet services. He founded one of the largest Internet Service Providers in New York City, Interport, before it was purchased by RCN. Since that time, he’s continued to be an internet entrepreneur and engineer. John has been named a WebRTC Technology Pioneer by TMC at the WebRTC Conference and Expo.