Learn more about OnSIP with customer reviews, pricing and frequently asked questions about OnSIP VoIP software.

Updated on June 20th, 2019

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OnSIP is a cloud-based phone system for businesses. OnSIP's business VoIP phone technology provides simple communications solutions to businesses of all sizes with features like voicemail, auto attendant and call groups.

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Plan Name

Monthly Price


$0.00 per user.

Pay As You Go

$0.00 per user ($49.00 feature minimum).

Metered User

$8.95 per user.

Unlimited User

$24.95 per user.

OnSip Reviews

Pros: Easily integrates with most CRM systems and great voicemail-to-email feature.

Cons: No text messaging feature available.

Bottomline: Excellent platform to efficiently manage business communication processes.

Key Information:


Michael Oeth




New York, NY

Number of Employees


Number of Customers



Michael Oeth


55 Broad St., 20th Floor, New York, NY, 10004

Phone Number

+1 800-801-3381






Andrew Hyde - proformative.com

I would highly recommend OnSip (www.onsip.com), and not buy any system equipment (other than handsets) at all. I have NO association with OnSip at all, other than being a very satisfied customer. I know the whole VoIP space quite well as former CFO of Speakeasy, a nationwide provider of VoIP services. In my current company we have a number of folks who happen to have very deep background in this area as well. We ended up choosing OnSip and have been VERY happy. No equipment to manage other than the handsets themselves which you can buy separately (we have Polycom IP 550 Sip units). I have one handset in the office and one in my home office -- they ring simultaneously so it doesn't matter where I am physically, I'm always "in my office." Pricing is good, sound quality is PERFECT, including our daily staff conference calls with employees in CA, UT, TX, FL, and Jordan (yes, the country).

HDClown - reddit.com

I have a number of smaller offices on OnSIP, largest one around 15 users and I don't really find it hard to manage, although there's a bunch of manual stuff I have to do for every new user/phone that would certainly be nice if it could be template based.

Dan Ritter - tech.lopsa.narkive.com

I can recommend OnSIP for this; they used to be called Junction Networks. We've been a customer for many years. Technical support is top-notch, prices are pretty good but not rock-bottom.

Lawrence Sinclair - eastagile.com

If you would like your calls to have absolutely the best sound possible, you should use a SIP provider like onsip.com (we use them).

MikeDinIT - community.spiceworks.com

I have not loved SFB for phone. If you're looking for cloud sip providers, I really like OnSIP. Waaaaay cheaper than RingCentral.


What is OnSIP?

OnSIP is a cloud-based phone system for businesses. Their business VoIP phone technology provides businesses of all sizes with simple communications solutions with features like voicemail, auto attendant, and call groups.

What is OnSIP trunking?

OnSIP Trunking is OnSIP's new SIP-based PSTN trunking service that replaces the legacy PSTN Gateway product. It leverages the OnSIP Hosted PBX platform, which offers additional reliability.

How can I get a free SIP account?

OnSIP comes with a free softphone application for mobile and desktop, which you can use with any standard SIP application. Also, register your SIP address on any SIP-based desk phone for free voice and video calling.

What is the price range for OnSIP's VoIP phone plans?

OnSIP's plans range in price from $0.00 to $24.95 per user per month. You can also purchase OnSIP apps and add-ons that cost anywhere between $2.00 and $50.00.

View their full list of prices here.

What is a cloud SIP?

SIP is a technical acronym that stands for Session Initiation Protocol. A cloud SIP is an online program like OnSIP VoIP that can initiate communication between two points using an internet connection. Your cloud SIP provider uses this technology to convert your phone system from conventional phone lines to a digital communications network.

Cloud Voip

What are some cloud VoIP providers?

How do I perform an OnSIP cloud VoIP test on my network?

You can get a free VoIP network test by going to info.onsip.com/voip-test. The test will check your overall network performance and gauge upload and download speeds, plus identify any issues which may lead to poor audio quality.

What is Junction Networks?

Junction Networks Inc is the parent company of OnSIP. OnSIP is Junction Network's SIP cloud software solution.