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Free your communications

Get OnSIP. Secure voice, video, and more on all your devices.

Counterpath Bria with a Free SIP Account

A Free SIP Account for Any Device

OnSIP is compatible with all open-source mobile VoIP applications. You can use your free OnSIP SIP account with downloadable softphone applications on your computer or smartphone, such as Counterpath’s Bria and the free Jitsi project. You can also register your SIP address on any SIP-based desk phone for free voice and video calling.

Matt Grech - OnSIP quote on WebRTC

"Utilizing WebRTC allows for far greater flexibility than already available ... OnSIP might have started something really big, possibly a new trend in how to expand your communications even more"

Matt Grech, Business Tech Journalist, GetVoIP
OnSIP App on a tablet

What’s included with the OnSIP Free Plan?

The OnSIP Free Plan is a 100% web based voice, video, and messaging solution for teams. Users can use our free webphone, the OnSIP app, or register their free SIP address with any compatible device or application to make free voice and video calls. Also included:

  • Up to 100 users with unlimited extensions
  • Free SIP to SIP calling
  • Custom web call links and HTML buttons
  • Slack and Zendesk integrations
  • Google Chrome extension

Learn More

Looking for GetOnSIP?

If you’re looking to create a free SIP address, you can now get one by signing up for the OnSIP Free Plan. (We are no longer offering SIP addresses with the getonsip.com domain.) In fact, you can create up to 100 SIP addresses with your free OnSIP account on the onsip.com domain, or even customize your addresses using your own domain!

Get Started For Free Upgrade Plan

Enhance your applications with SIP

Integrate SIP-based voice and video into your applications for powerful HD communications on any device with our developer services. Best of all, it's all built on a robust, industry-leading SIP platform that handles all the scaling for you.

Learn More

var ua = new SIP.UA();
ua.message(
  'john@example.onsip.com',
  'Hello, world!'
);
var session = ua.invite('john@example.com'); session.on('accepted', function () { this.bye(); });

Sign up for your free OnSIP account

Get Started

Frequently Asked Questions

What is a SIP address?

Think of a SIP address like an email address, except for real time communications instead of email messages. Like your email, you have an address (known as a SIP address), at which your friends and colleagues can reach you. A SIP address looks the same as an email address (john@acme.onsip.com, for example).

What is WebRTC? How does it tie into OnSIP?

WebRTC is an open source project that enables web pages with real time communications capabilities such as audio and video calling. We've used it to create a phone in your browser (the OnSIP app) for you to make and receive calls to / from other SIP addresses.

What other devices and/or platforms can I use with my SIP address?

OnSIP is built entirely using open standards, which means your SIP address is not limited to your web browser. You can 'register' your SIP address to SIP desk phones, applications on your smartphones and tablets, and software phones on your personal computer. You can take your SIP address anywhere and have 'active registrations' on up to 10 different devices.

Here are a list of popular mobile and desktop applications that you can use with OnSIP:

We also publish third party reviews of VoIP desk phones. Click here to see our list of phones.

How do I ‘register’ my SIP address to a phone/app/software phone?

'Registering' your SIP address is similar to logging into an email account via any email application. Your email account comes with an email address and a password (i.e. your email credentials), and you can login and use your email account from any application if you have your credentials.

Similarly, every SIP phone or application will request your SIP credentials in one form or another during setup. Your SIP credentials can be found by logging into the OnSIP app and selecting Settings from the Menu in the top left corner. Simply enter your SIP credentials into the fields provided by any SIP application or phone, and your SIP address will be registered.

Visit our Knowledgebase for detailed instructions on how to register your SIP account with the most popular mobile apps, software phones, and VoIP desk phones.

What are ‘active registrations’?

If a device, browser, or application is actively registered with your SIP address, it means that it can make and receive calls. If you have multiple devices registered, when someone calls your SIP address, all registered devices will ring simultaneously.

Can I call phone numbers?

If you have a GetOnSIP SIP address or sign up for the OnSIP Free Plan, you will not be able to dial phone numbers. Calling phone numbers with a SIP address requires a SIP-to-PSTN gateway service, which we offer for businesses on any of our paid plans.

Can I build SIP audio/video calling into my application or website?

We offer developer services for companies and developers interested in using our SIP platform for their own custom solutions. Please enter your information, and a member of our team will contact you to discuss your needs shortly.

Is OnSIP secure (encrypted) communication?

Calls are secure, peer-to-peer communications if both parties are using the OnSIP app. For instance, if you communicate with someone via your OnSIP professional call link, the media (content) of your call will be encrypted by DTLS SRTP standards.

WebRTC Compatibility Charts

Legend

Works without issue
Audio call

Quality Issues
Video call

Fails

Cross Browsers

Note: The Android Chrome tests assume Wifi connectivity. Currently, 4G connectivity is incapable of reliable WebRTC functionality.

Chrome Browser Firefox Browser Opera Browser Android Chrome Android Firefox
Chrome Browser
Firefox Browser
Opera Browser
Android Chrome
Android Firefox

Soft Phones

Note: The Android Chrome tests assume Wifi connectivity. Currently, 4G connectivity is incapable of reliable WebRTC functionality.

Chrome Browser Firefox Browser Opera Browser Android Chrome Android Firefox
Bria for Android
Bria for iPhone
Bria for OSX
Bria for Windows
Jitsi

Desk Phones

Note: The Android Chrome tests assume Wifi connectivity. Currently, 4G connectivity is incapable of reliable WebRTC functionality.

Chrome Browser Firefox Browser Opera Browser Android Chrome Android Firefox
All Desk Phones