Independent quality assurance for telecom, cloud communications, and Voice AI
We built Sipfront so teams can prove voice quality on real calls across real networks — continuous, independent assurance you can act on, not just another incident queue.
Our story in numbers
Built on decades of VoIP and infrastructure experience.
One QA strategy across performance and compliance.
Neutral validation across telecom, cloud communication, and Voice AI systems.
Our mission
We help organizations build confidence in production voice systems rather than in ever longer incident queues. We align how you ship, monitor, and prove quality with what callers actually experience on the line.
When voice is business-critical, assurance should stay continuous, automated, and easy to act on. That is the bar we hold ourselves to every day.
Our story
Sipfront was founded by people who built the voice industry’s core infrastructure. Andreas Granig has designed, built, and operated voice platforms since 2000. He serves on the management board of Kamailio, the most widely deployed open-source SIP proxy, which powers the signaling behind much of today’s UCaaS, CCaaS, and Voice AI platforms.
Together with Daniel Tiefnig, Andreas co-founded Sipwise — later acquired by Alcatel-Lucent Enterprise — where the team created rtpengine, the open-source media engine that now carries real-time audio for many of the world’s leading communication and Voice AI platforms. Along the way, Andreas became a regular keynote speaker at open-source telecom and RTC conferences.
Building and operating those platforms meant testing voice largely by hand — and often not being able to test or monitor it adequately at all. In 2020, drawing on that experience, the team founded Sipfront to close the gap: an independent layer of automated testing and monitoring on real calls across real networks, so operators can move fast and still deliver top quality.
Since then, Sipfront has grown into a SaaS platform that operators and product teams use to simulate traffic, catch regressions early, and keep Voice AI and enterprise communications reliable at scale.
Operators and product teams that ship voice with Sipfront.
How teams use Sipfront to keep telephony and voice AI reliable
Sipfront is our independent truth layer. It ensures our global Voice AI is not just stable, it is a competitive advantage that protects our revenue and defines our brand.
Josef Lapka
CPTO at
Sipfront’s automation framework helps us give our business customers the best service in the industry.
Robert Steinhäuser, MBA
Product Manager at
With Sipfront we have optimized bringing yuu Phone (cloud PBX) into service. Even before go-live, we ensure a professional, competent customer experience.
Markus Scherer
CTO at 
With Sipfront we have an experienced partner at our side with whom we can ensure end-to-end quality and availability of our voice services.
Reiner Kroha
Head of Data, Security & Voice at 
As a quality-focused provider, we place the greatest emphasis on highly available services. With Sipfront we have certainty that our voice service meets these requirements.
Henning Holtschneider
Head of VoIP Services at