We allow anyone to leverage our APIs to build powerful, productivity-boosting applications and integrations.  Learn more.

Click-to-Call Browser Plugins

OnSIP works together with business services and software you use everyday. One of our most popular integrations is our Chrome click-to-call browser plugin.


A free softphone and voicemail management application for Windows, Mac OSX, iOS, Android, and web. All you need to get started is your SIP address and password. Use it as your go-to business phone or as a quick and easy way to test drive OnSIP. The OnSIP mobile app lets you make HD voice and video calls, view real-time presence information for your contacts, and review past calls and messages; the OnSIP desktop app additionally offers queue reporting, advanced user settings, and more.  Learn more.

Highrise Plugin

Automatically log your calls in Highrise each time you call or receive a call from one of your Highrise contacts. The plugin records the time of the call, and allows you to add notes.  Learn more.

Zendesk Integration

Make customer service that much easier by automatically creating and assigning Zendesk tickets on inbound calls to the agents who answer them.  Learn more.

Zendesk & Phonetag Integration

Automatically turn your voicemail messages into Zendesk support tickets.  Learn more.

VoIP Readiness Test

This test will let you know if your network is ready for business VoIP.  Learn more.

Live Call Map

We built this integration with Google Maps to help you visualize OnSIP. This shows OnSIP calls across the USA as they're made in real time.  Learn more.


Want to suggest an integration? Tell us about it here.