SignalWire Launches Open Source SDK and Reference App for Next-Gen Communications and Voice AI

SignalWire has released a beta open source Call Fabric SDK and Reference App for developers to build modern communications apps with Voice AI Agent capabilities across web, iOS, and Android. The JavaScript-based SDK is adaptable for mobile, and the Reference App showcases real-time voice, video, chat, and AI-powered agent experiences. The platform is open source, cross-platform, enterprise-ready, and community-driven.

SignalWire, a leading provider of Programmable Unified Communications (PUC), has announced the open beta release of its fully open source Call Fabric SDK and Reference App. This milestone release empowers developers to quickly build, customize, and launch modern communications apps, including intelligent solutions powered by the SignalWire Voice AI Agent across web, iOS, and Android [1].

The new Call Fabric SDK is JavaScript-based, with React Native adaptors for mobile, enabling rapid development of real-time voice, video, chat, and AI-powered agent experiences. The open source Reference App showcases the latest Call Fabric features, including subscribers, rooms, audio, video, screen sharing, and chat APIs. Developers are provided with a robust foundation to create a wide range of applications, from simple click-to-call widgets to full-featured Unified Communications as a Service (UCaaS) or voice AI applications [2].

Anthony Minessale, CEO and co-founder of SignalWire, commented, "SignalWire was founded to put Programmable Unified Communications in the hands of developers. With our new SDK and Reference App, we’re removing barriers and giving builders a truly open, flexible platform to bring advanced communications and Voice AI solutions to life on their terms."

Key highlights of the SDK and Reference App include:
- Open source, developer-first: Access all code on GitHub, with detailed quickstart guides and API documentation.
- Cross-platform support: Build for web today; iOS and Android coming soon via React Native adaptors.
- Advanced capabilities: Easily create voice, video, chat, and Voice AI Agent apps.
- Enterprise-ready: Includes OAuth, secure onboarding, and responsive UI components.
- Community-driven: Submit feedback and pull requests on GitHub; get support via SignalWire Discord and Slack channels.

Developers are encouraged to explore the code, report bugs, suggest features, and help shape the platform’s future. Upcoming roadmap features include expanded messaging (SMS, MMS, WhatsApp) and advanced AI integrations like IVR, transcription, and summarization.

To get started, developers can access the SDK and Reference App on SignalWire’s GitHub, join the community on Discord, and explore documentation and quickstarts at [https://developer.signalwire.com/sdks/browser-sdk] [3].

References:
[1] https://www.streetinsider.com/Business+Wire/SignalWire+Unveils+Beta+Open+Source+SDK+%26amp%3B+Reference+App+for+Next-Gen+Communications+and+Voice+AI/25165966.html
[2] https://www.businesswire.com/news/home/20250807936328/en/SignalWire-Unveils-Beta-Open-Source-SDK-Reference-App-for-Next-Gen-Communications-and-Voice-AI
[3] https://developer.signalwire.com/sdks/browser-sdk