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Hosted VoIP solutions built for your business

OnSIP’s business VoIP communications are designed to match how you work - giving you the phone service you need for the price you want. Get started today.

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Trusted by over 100,000 businesses

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You make the calls

Our fully customizable phone system is a breeze to set up. Easily add and remove users and features to suit your business needs. And only pay for what you need with month-to-month contracts.

OnSIP VoIP solution
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VoIP tech you can trust

We designed a system that’s so bulletproof, we patented it. Enjoy an always up, always on VoIP platform that's cloud-based, has high redundancy, and can be used by businesses to comply with their HIPAA obligations.

Our patented technology
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Hardware on the house

Make calls directly from the app, or use a desktop phone if you prefer. Best-in-class VoIP phones are included with the Unlimited plan (5 users minimum).

Free phone offer
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Hosted VoIP Service Features

Auto Attendants

Auto Attendants allow you to set up a touchtone menu of options for your callers.

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Ring Groups

Group similar users together, such as Billing, and ring them all simultaneously or in succession.

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Voice Mail Boxes

Setup a mailbox to manage voice messages and custom greetings.

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Dial-by-Name Directory

Create a company directory for callers to reach employees by spelling their names via touch tones.

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Call Screening

Identify the name and/or number of incoming callers.

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Call Waiting

View and be notified when another call is coming in if you’re on a call.

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Call Forwarding

Redirect an incoming call to another destination, for example an extension or external phone number.

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Attended or Blind Transfer

Send calls to another extension or 10-digit phone number with or without interaction with the person receiving the call.

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Music-on-Hold Channels
Music on hold settings allow you to control the music your callers hear when they are placed on hold. 3 genres included: Jazz, Classical, and Elevator.
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Enhanced Music-on-Hold
Standard Music on Hold includes 3 genres. Upgrading to Enhanced unlocks Internet radio streams and uploaded audio files.
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Call Recording

Record your calls and upload to any compatible cloud storage provider.

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Call Parking Lots

Allow one user to put a call on hold from one device and another user to continue the conversation from any other device.

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Busy Lamp Field

A presence indicator that allows you to see who in your organization is available at any given time.

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Interoffice Paging

Page colleagues from phone to phone or generate company-wide broadcasting.

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Applications that play a message to the caller then immediately forward them on to another address.

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Business Hour Rules

Direct incoming calls to different destinations based on the time of day and day of week.

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Personal Ring Strategy

Set your ring time and where to send a call if it’s not answered.

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Call Management
Handle business calls with ease: Place them on hold, mute them, and transfer them to colleagues.
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Phone Numbers
OnSIP has numbers available for purchase from many different area codes.
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Call Blocking

Stop annoying or unwanted calls from reaching you by filtering or blacklisting the number from your system.

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International Dialing

Dial international phone numbers from your OnSIP account.

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Ring another user’s extension and then automatically open their speaker phone for a two-way conversation.

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HD Conference Suites

Host an audio call for up to 15 simultaneous callers at an extension or phone number of your choosing.

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Simple Queue Routing

A virtual waiting room with Music-on-Hold for your callers to wait for the next available representative.

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Do Not Disturb

Silence incoming calls to your deskphone and/or soft client app when you don’t wish to receive calls.

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Caller ID

Set a default Caller ID for outgoing calls and/or set a personal Caller ID for those with direct dial phone numbers.

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3-Way Conferencing

Lets you connect two other callers at the same time to speak simultaneously.

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Grants users access to 911 services by defining a physical location for each user.
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Enhanced ACD Queues

Amplify your sales and support performance with our advanced inbound call monitoring and call distribution.

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Enhanced Queue Recording

Automatically upload recordings of all calls to and from any agent in a queue to any compatible cloud storage provider.

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Historical Queue Reporting

Access and download historical reports on queue call stats and agent performance. You can also have them emailed out on a periodic basis.

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Monitor, Whisper, Barge

Listen in on Enhanced Queue calls, speak directly to the call agent, or join the call with the agent and caller.

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Queue Failover

Set a timer for however long you want callers waiting in the queue before redirecting them to a voicemail.

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Supervisor/Agent Login

Queue Supervisors can log individual agents in or out of a given queue, rather than having the agent manually enter in numerical codes from their phone.

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Custom Announcements

Play a custom recorded message to your callers when they reach a menu or enter a queue.

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Live Queue Dashboard

An up-to-the-minute view of your company’s call queues for Supervisors.

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Custom Ring Strategies
Choose between Simultaneous and Hunt Ring strategies for your ring groups.
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Desktop App

OnSIP's softphone app, available for Mac, Windows, and Linux computers.

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Browser App

OnSIP's softphone app, available in Chrome, Firefox, or Opera browsers.

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Soft Client Twinning

Allows you to have your softphone app to automatically ring your extension in succession with your deskphone.

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5-Room Video Calling

In the OnSIP web and desktop apps, host and join video conference calls with internal collagues as well as external participants (up to 5 people on the call).

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End-to-End Encryption
OnSIP provides secure end-to-end encryption when using any of our softphone apps and encryption can be set to desk phones as well.
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Audio Conference Suites
Host an audio call for up to 15 simultaneous callers at an extension of your choosing.
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Mobile App
Make and receive work calls from your extension using our softphone app;  available for iOS and Android devices.
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External Phone Numbers

Add phone numbers from outside of your OnSIP account, to be used for extension dialing, failover destinations, and other call routing situations.

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Extension Dialing

Dial extensions in your OnSIP account from any OnSIP-registered phone.

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Professional Call Links

A unique URL that you can send to anyone to invite them to a voice or video call from any supported web browser.

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Connect and operate a remote door-unlocking system.

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Team Pages
A visual directory for your website visitors to see if your customer-facing team members are online and available for a voice or video call.
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Remote Office - WFH
Whether you have multiple locations or chose to work from home, you’ll have the presence of being in the same office.
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Find Me / Follow Me

Receive incoming calls at any one of your extensions and/or create a call-forward and follow you to another location, i.e., your cell phone.

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Voicemail to Email

Have your voicemails delivered to your inbox via an audio file to listen to.

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Mobile Twinning

Allows you to have your mobile phone to automatically ring your extension in succession with your deskphone.

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Virtual Phone Number

Numbers that are used to transmit and receive calls over the internet rather than strictly through copper telephone wires.

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Never miss a call by having your extension ring on any or all of your devices simultaneously.
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Location Settings
Add users from different locations. Also, up to 10 registrations/user allowed.
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Admin Portal

Administer your OnSIP account with setup wizards, edit features in real-time, manage payment + contact information, and download invoices, all in our web app.

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Real-Time Changes

Moves, adds, and changes to features in your OnSIP account occur in real-time.

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Extensive Knowledgebase

20 years in the making, our KB offers detailed articles, step-by-step instructions and video walkthroughs for set up.

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Open Compliant Boot Server

Automatically provision supported VoIP phones.

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Network Status Updates
View our Network status page for up-to-date network alerts.
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Call Logs & CDRs

Access and download your account's call detail records for user-specified time periods.

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SIP Domain Hosting

Use your own domain name with your OnSIP Hosted PBX.

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Billing Portal

View invoices, update billing contact, view purchase history and more in our web app’s billing portal for easy accounting.

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Have an existing number you'd like to keep? OnSIP will assist with porting that number over from your previous provider.

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Odoo Integration
VoIP calling straight from the Odoo CRM & ERP dashboard.
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HubSpot Integration

Display a caller's HubSpot record in the OnSIP app, with a link to open the full record in a new tab.

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Zendesk Integration

When an agent answers a call, a Zendesk ticket is automatically created, assigned to the agent, and populated with basic call info.

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Google Chrome Extension

Click on phone numbers in your Chrome browser window to dial them automatically.

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Open API Integration
Add real-time communications to your app in no time. Leverage the OnSIP platform, by the creators of sip.js.
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People love us!

Gartner Digital Markets has awarded OnSIP its exclusive Best Customer Support badge, based on high marks and strong reviews left by OnSIP customers.

Customer service award

Read more about OnSIP


Gartner Digital Markets Again Awards OnSIP a Best Customer Support Badge!

OnSIP receives a Gartner Digital Markets Best Badge, which highlights highest-rated products and services based on verified user reviews.

2024 award win
10 Sample Call Center Greeting Scripts Featured Image (iStock-1032472578)

10 Sample Call Center Greeting Scripts

Is your auto attendant clear and easy to understand? Here are 10 sample greeting scripts to make a good first impression on the phone.

Script examples
Picture of a telephone receiver off of the hook.

Does Do Not Disturb Send Calls to Voicemail?

Where does a call go if your smartphone, VoIP phone, or softphone is set to Do Not Disturb? Read on for the answers!

Learn about Do Not Disturb

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