Explore Yeti-Switch, an open-source SIP session border controller, Class 4 softswitch, and real-time billing system built for VoIP carriers and wholesalers.
Yeti-Switch is an open-source SIP Session Border Controller, Class 4 softswitch, and real-time VoIP billing system built on the SEMS SIP/RTP application server. It is aimed at telecom carriers and wholesale voice providers who need to interconnect and route large volumes of voice traffic.
Rather than being a single-purpose tool, Yeti-Switch combines session border control, call routing, and billing in one platform, which is a common requirement for carriers running Class 4 switching infrastructure between other telecom networks.
The project is maintained by the open-source Yeti-Switch community and hosted on GitHub, with documentation, a demo environment, and a public forum available for evaluation and support.
Core carrier features include dynamic routing with least-cost routing, load, and capacity control, along with integrated real-time billing for both wholesale and retail VoIP services.
The platform includes a number portability database, STIR/SHAKEN call authentication for combating spoofed caller ID and robocalls, and Microsoft Teams Direct Routing compatibility for connecting to Teams telephony.
Administration is handled through a REST API and a web-based customer portal, giving carriers programmatic and self-service ways to manage accounts, routes, and billing configuration.
Yeti-Switch is free, open-source software with no licensing cost, since its code is publicly available under the yeti-switch GitHub organization.
The project accepts voluntary community support and donations through Patreon rather than charging for the software itself.
Organizations deploying Yeti-Switch in production should budget for their own hosting infrastructure and SIP or telecom engineering expertise, since no official paid support tier is advertised on the project's site.
Yes, Yeti-Switch is open-source software that can be deployed without licensing fees, with optional community support via Patreon.
It is used by telecom carriers and wholesale VoIP providers as a Class 4 softswitch, session border controller, and real-time billing system.
Yes, it includes STIR/SHAKEN call authentication support to help reduce caller ID spoofing.
Yes, it offers Microsoft Teams Direct Routing compatibility.
It is built on SEMS, a high-performance SIP and RTP application server.
Yes, it has an integrated real-time billing system for both wholesale and retail VoIP services.
It is maintained as a community open-source project, with code hosted on GitHub and support accepted through Patreon.