As voice AI rapidly moves from experimental pilots to real-world production systems, building reliable, scalable, and high-performing voice agents is no longer optional,  it’s mission-critical.

Today, Coval and Vapi are excited to announce a deeper partnership and seamless product integration that brings together the best of voice orchestration and evaluation infrastructure, helping teams build voice applications that are ready for real-world scale.

The Challenge of Scaling Voice AI

Voice AI has evolved dramatically in the past two years. What started as small technical experiments is now powering real customer interactions across support, finance, insurance, and other critical industries.

But as more companies deploy voice agents into production, the challenges multiply:

• Latency and responsiveness must meet human expectations.

• Interactions must handle interruptions, background noise, and unpredictable customer behavior.

• Scaling from one agent to hundreds demands proactive evaluation and continuous quality assurance.

Building the voice stack is only part of the journey. Ensuring reliability and continuous improvement is what separates successful deployments from stalled experiments.

Vapi + Coval: Complete Voice AI Infrastructure

Vapi provides the core orchestration platform for voice AI, enabling technical teams to deploy sophisticated, low-latency voice agents at scale. With Vapi, companies can focus on building vertical-specific voice solutions without reinventing complex real-time audio infrastructure.

Coval complements Vapi by providing the critical evaluation, simulation, and testing infrastructure needed to ensure agents remain reliable over time. From latency analysis to conversational accuracy, interruption handling, and the contextual integrity of multi-step workflows, Coval enables systematic, automated evaluation of voice agents operating in real-world environments.

Together, Coval and Vapi create an end-to-end solution: from voice orchestration to voice evaluation, empowering teams to build, deploy, and continuously improve production-grade voice applications with confidence.

What’s New: Seamless Evaluation Integration

Through this partnership, Coval and Vapi now offer a tightly integrated experience, making it easy for teams to:

• Run automated evaluations across Vapi-managed calls.

• Monitor critical metrics like latency, interruption handling, task success rates, and context-specific workflow evaluations.

• Detect regressions early with automated alerting before they impact customer experience.

• Scale evaluation across multiple agents, workflows, and modalitie..

As voice deployments grow in scale and complexity, having a continuous evaluation layer is no longer optional — it’s essential for maintaining production-grade reliability.

Why This Matters

• For engineering teams: Streamline both voice infrastructure and evaluation without compromising on depth, flexibility, or control.

• For enterprises: De-risk production deployments with continuous, automated quality checks across customer journeys.

• For fast-scaling startups: Embed reliability best practices from day one without building heavy evaluation pipelines internally.

What’s Next

We’re kicking off this partnership with a joint panel event:

Scaling Voice AI: Engineering for Enterprise Reliability with Vapi and Coval

📍 Vapi office, San Francisco

📅 April 30th

Join us to hear real-world lessons from teams building the next generation of voice applications. Register here: https://lu.ma/2g6t6h85

Special Launch Offer

To celebrate this partnership, we’re offering 50% off the first 2 months of Coval for all new customers deploying on Vapi infrastructure.

*only applicable for new customers. To receive the discount, contact support@coval.dev