# SignalWire

> SignalWire is a Palo Alto communications infrastructure company founded by the FreeSWITCH team. Its hosted platform puts voice, messaging, video, call control and AI agents behind developer APIs, SDKs and visual tools, with usage-based pricing and a commercially supported FreeSWITCH offering.

- **Founded:** 2017
- **Headquarters:** Palo Alto, United States
- **Founders:** Anthony Minessale II (Founder and CEO), Evan McGee (Co-founder and CTO), Sean Heiney (Co-founder and former COO)
- **Products:** SignalWire Cloud / Call Fabric, AI Agent Runtime, SignalWire SDKs and SWML, Call Flow Builder, FreeSWITCH Enterprise / Advantage
- **Notable:** Creators of FreeSWITCH founded SignalWire and continue to maintain the open-source project., Company reports more than 2.7 billion minutes and messages delivered annually across more than 2,700 companies., Robotalker reported migrating roughly 1,000 phone lines in five days while leaving thousands of lines of autoresponder code unchanged.

## Products & services

- **SignalWire Cloud / Call Fabric** — Hosted telecom and call-control infrastructure for voice, SIP, messaging, video and AI workflows.
- **AI Agent Runtime** — Voice AI orchestration with speech recognition, language-model interaction, speech synthesis, memory and tool calls in the call path.
- **SignalWire SDKs and SWML** — Server SDKs, REST and real-time Relay APIs, plus SignalWire Markup Language for defining call behavior.
- **Call Flow Builder** — Visual tool for creating call routing and IVR flows.
- **FreeSWITCH Enterprise / Advantage** — Commercial edition, support and services for FreeSWITCH deployments.
- **AI Sidecar** — An AI listener attached to live calls that sends coaching or compliance signals to a customer webhook.
- **AI Chat** — Web chat channel that uses an existing voice-agent definition and shared context; priced separately per turn.

## Achievements

- Creators of FreeSWITCH founded SignalWire and continue to maintain the open-source project.
- Company reports more than 2.7 billion minutes and messages delivered annually across more than 2,700 companies.
- Robotalker reported migrating roughly 1,000 phone lines in five days while leaving thousands of lines of autoresponder code unchanged.

## Latest updates

- **2026-09** — Introduced AI Sidecar for listening to live calls and sending real-time signals to customer webhooks.
- **2026-09** — Introduced AI Chat, allowing a voice-agent definition to work in an embedded web chat with shared context.
- **2026-07** — Published Robotalker case study describing a five-day migration of roughly 1,000 phone lines.
- **2025-08** — Opened early access to WhatsApp messaging integration.
- **2025-07** — Released an early access beta of its open-source Agent Builder.

## Links

- Website: https://signalwire.com
- LinkedIn: https://www.linkedin.com/company/signalwire
- Twitter/X: https://x.com/signalwire
- GitHub: https://github.com/signalwire
- YouTube: https://www.youtube.com/channel/UCerXdtujij53AL9IOBFj4SA
- Facebook: https://facebook.com/signalwireinc

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Profile page: https://yespress.io/signalwire
Published by YesPress — https://yespress.io
Last updated: 2026-09-30