SignalWire Launches Open Source Agent Builder Beta, Accelerating Voice AI Development

PALO ALTO, Calif.--(BUSINESS WIRE)--SignalWire, the leader in Programmable Unified Communications (PUC), today announced the early access beta release of its open source SignalWire Agent Builder. This innovative, no-code platform empowers developers to rapidly build, test, and deploy sophisticated AI voice agents on SignalWire’s full-stack communication infrastructure.

SignalWire Agent Builder combines an intuitive visual interface with advanced AI capabilities, significantly simplifying the creation of conversational voice agents. By automatically generating SignalWire Markup Language (SWML) configurations, developers can seamlessly integrate voice AI agents with SignalWire’s telephony services without writing code or managing infrastructure. The Agent Builder is powered by SignalWire’s robust Agent SDK, which includes gateways to a flexible skills system and an open-source Retrieval-Augmented Generation (RAG) stack, further enhancing AI agent capabilities. SignalWire’s industry-leading latency (~500ms), enabled by its full-stack communications platform, results in exceptionally human-like interactions. Developers no longer need to learn or worry about telecom complexities when building AI Voice Agents with SignalWire.

"Open source is part of our DNA at SignalWire," said Anthony Minessale, CEO and co-founder of SignalWire. "With the SignalWire Agent Builder, we're continuing our commitment to the developer community, allowing FreeSWITCH developers and newcomers alike to harness cutting-edge voice AI capabilities effortlessly. This platform marks a significant leap forward in how voice agents are built and deployed."

Key features of the Agent Builder beta include:

• Visual agent configuration without code
• Automated SWML generation for fast deployment
• Integrated skill testing and media asset management
• Knowledge-base integration for context-rich conversations
• Real-time collaboration and call analytics

By removing complexity and streamlining workflows, SignalWire Agent Builder addresses critical challenges faced by enterprises, from customer support automation to sophisticated sales interactions. Its cloud-native architecture ensures scalability for businesses of all sizes.

Developers can access the beta immediately via GitHub, supported by comprehensive documentation and a dedicated community on Discord.

For more information, visit https://github.com/signalwire/signalwire-agents-ui.

This announcement coincides with SignalWire’s presence at ClueCon 2025, showcasing its latest innovations directly to the developer community. Learn more here: https://www.cluecon.com/.

About SignalWire

SignalWire delivers the most advanced Programmable Unified Communications (PUC), trusted by developers and businesses worldwide.