SIPSTACK - Scriptable VoIP Platform

Feature Stacked

For traditional, on premise IP based PBX systems, or direct use with a SIP device or app, IP Lines & SIP Trunking tools built-in.

Cloud based phone services for your business. No onsite PBX required. Highly scalable. Highly Customizable. Layered Security!

Send & receive faxes by email. The quickest and easiest way to manage single or multiple fax lines all from one unified system.

A conference bridge solution finally built the right way. Integrated across all system features and accessible globally.

Multi Tenant

SIPSTACK allows Internet Telephony Service Providers to setup and manage multiple independent PBXs within a single portal to offer their customers powerful PBX features in a secure hosted environment.

SIPSTACK offers ease of service provisioning and management to service providers and advanced functionality to their customers.
Scriptable

SIPSTACK's "stackable" infrastructure allows providers to easilty setup custom scripts (stacklets) on every service. Go beyond basic call routing and create simple or complex scripts to run when a service is called or executed.

For example, if your customer or user requires advanced functions when their phone rings, you can now create custom stacklets to perform those tasks, such as call an external API, auto record call and email one call ends or even auto update external CRM systems based on call information.
Free Features

SIPSTACK includes all features required in a PBX system at no cost. You can provision entire offices, configure phones and routes as needed, call internally all before any charges are incurred. Only pay for usage and traffic when calls are coming in or out of the sytem. Phone numbers and emergency addons are also changed upon activating those services.
No contracts, no commitment... To get started, create an account and start setting up your voice services. When ready to connect to the outside world, add funds to enable inbound and outbound routes.

Pay only for resources you actually use. No setup fee, no minimum spend.

All SIPSTACK services allow you to create as many devices & services you need!
(Free forever!)

CREATE FREE ACCOUNT

*Call usage, DID's and e911 fees are applicable. See Rates >

Guided Tours

Not only do we have a huge online repository of articles, guides and video tutorials, every page has a guided tour built right in to help get your phone system working quick and easy without switching pages.
Beautiful Reports

Designed with you in mind. Access call logs, recordings, faxes, call analysis, destination and spend view in an easy and beautiful way. Export reports to your analytical software in just a click.
Team Accounts

Invite team members to access and manage various areas of your PolarFlake system. Billing managers can handle payments and reports, while admins can support and control all areas of your phone system.