About Sipfront

Engineering trust into every Voice AI interaction

Sipfront combines telecom engineering depth with modern automation to help teams move from promising demos to resilient production systems.

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25+ years

carrier-grade telecom engineering depth

Built on decades of VoIP and infrastructure experience.

3 pillars

operational, revenue, and regulatory assurance

One QA strategy across performance and compliance.

1 layer

independent quality truth layer

A neutral validation layer across vendors and systems.

Our vision

We envision a voice ecosystem where every interaction is trustworthy by default and where reliability is treated as a measurable standard, not an assumption. As Voice AI becomes part of customer-critical workflows, quality, transparency, and compliance should be continuously proven across every release, handover, and production environment. We believe teams should be able to scale innovation without losing control, with clear evidence that systems behave consistently under real-world load, across networks, and in moments that matter most to end users and operations teams.

Our mission

Our mission is to help operators, enterprises, and Voice AI providers move from promising demos to resilient production through independent, measurable, and practical quality assurance. We combine telecom engineering depth with test automation so teams can validate performance, user experience, and regulatory readiness before issues impact customers. By turning quality into a continuous process instead of a one-time checkpoint, we help organizations reduce risk, accelerate launches, and maintain confidence in every customer-facing voice interaction.

Andreas Granig

CEO

VoIP engineer since 2000, co-founder of Sipwise, inventor of rtpengine, and Kamailio board member who founded Sipfront to make production-grade testing standard for mission-critical voice systems.

Daniel Tiefnig

COO & Co-Founder

Telecom operator and business leader since 2000 who scaled Sipwise for 14 years as CEO and now drives Sipfront’s operational strategy, growth, and execution.

Markus Seidl

CTO & Co-Founder

Engineering specialist from high-precision industrial software who leads Sipfront’s technical strategy and platform robustness for complex global voice networks.

Oliver Schlögl

Head of Sales

Commercial telecom leader with roots in carrier operations and Sipwise leadership who helps operators and service providers secure complex voice and AI services at scale.