Sunday, November 09, 2025
Ultravox, a leader in real-time Voice AI, has announced the rollout of production-ready global calling for AI-powered voice agents. This capability is built in partnership with Voximplant, a top cloud communications platform. With this update, developers can easily link their AI voice agents to existing phone systems and smoothly manage inbound and outbound calls worldwide without dealing with complicated telecom integrations.
Up until now, connecting AI voice systems with SIP-based phone infrastructure has required significant effort and technical expertise. Telecom standards often vary from vendor to vendor, creating delays and complexity. However, Ultravox and Voximplant have eliminated this challenge by offering a complete global calling solution directly through the Ultravox platform.
The collaboration brings together Ultravox’s advanced conversational capabilities and Voximplant’s reliable communications network already trusted in thousands of live deployments. As a result, AI agents can now deliver fluid, natural, and low-latency voice experiences that feel as clear and lifelike as speaking with another person.
This update benefits call centers, automation platforms, and app developers ready to adopt Voice AI without revamping their telecommunications infrastructure. Ultravox handles all backend call connectivity through developer-friendly APIs and prebuilt features, while Voximplant ensures stable performance and carrier-grade quality.
Zach Koch, CEO of Ultravox, highlighted the importance of eliminating industry barriers:
“SIP interop should not be a barrier to deploying great voice agents. By making SIP production-ready and native in Ultravox and by partnering with Voximplant on the heavy telephony lifting we’re removing a major adoption hurdle and letting teams go from prototype to production much faster.”
Voximplant’s Co-founder and CEO, Alexey Aylarov, added:
“Developers want dependable SIP interoperability, clean APIs, and the fastest path to real calls. That’s exactly what this integration delivers: Voximplant’s battle-tested telephony stack and Ultravox connector is now easily accessible inside Ultravox.”
With this innovation, organizations can confidently integrate conversational Voice AI into customer engagement strategies and accelerate time-to-value for AI-powered call automation.
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