SignalWire Markup Language (SWML) brings together the best of XML dialplans, CPaaS APIs, and real-time call control into a single, document-based format. It’s the new standard for building IVRs that are:

• Easy to read, modify, and deploy

• Expressed in JSON or YAML, not brittle code

• Fully integrated with AI, transcription, DTMF, and live actions

• Capable of handling branching logic, call recording, transfers, and API calls

If you’ve worked with FreeSWITCH, this will feel familiar—but cleaner and easier to scale.

SignalWire AI Agents aren’t bolted-on bots. They’re built into the call stack using the ai method in SWML. That means your AI can:

• Handle conversations natively, without bridges or proxies

• Gather structured data and execute logic in real-time

• Trigger secure handoffs, perform lookups, and summarize calls

• Adapt dynamically to user behavior

• Operate across multiple languages and voices

You define the agent’s behavior with plain text prompts, then drop it into any SWML script or Call Flow.

Not a developer? No problem. SignalWire’s Call Flow Builder lets you build full IVRs using a visual drag-and-drop interface. Add steps like:

• Answer call

• Play message

• Gather input

• Transfer to agent

• Invoke AI Agent

• Record call

• Route by time of day or input

It’s the fastest way to prototype, test, and deploy a working IVR—without needing to touch code. When you're ready for more advanced logic, you can export your flow and manage it using SWML.

Other platforms claim low latency. We deliver. ~500ms round trip latency to 2 billion people across the planet.

Sync call data, automate lead routing, and trigger workflows in platforms like Salesforce, HubSpot, and Zendesk.

SignalWire is backwards compatible with legacy CPaaS/CCaaS/on-prem for features like SIP, PSTN, and messaging, while adding a modern programmable layer for building custom UCaaS and CCaaS apps.