—— Built by the FreeSWITCH Team ——

Trillions of Minutes. Now With an AI Kernel.

The team that built FreeSWITCH extended the same platform with native AI. Same codebase. Same engineers. Two decades of voice infrastructure behind every call.

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2.7B

minutes and messages annually

2.7B

minutes and messages annually

2,000+

companies in production

2,000+

companies in production

20 years

continuous development

20 years

continuous development

< 1.2s

typical AI response latency

< 1.2s

typical AI response latency

—— Why Heritage Matters ——

Voice Infrastructure Is a Solved Problem (If You Built It)

Media Stack Ownership

The team wrote the media engine that powers voice networks worldwide. They can modify codecs, endpointing, and AI at the audio-frame level.

Media Stack Ownership

The team wrote the media engine that powers voice networks worldwide. They can modify codecs, endpointing, and AI at the audio-frame level.

Known Failure Modes

Two decades of production telephony means codec, buffering, endpoint, and billing edge cases are already catalogued.

Known Failure Modes

Two decades of production telephony means codec, buffering, endpoint, and billing edge cases are already catalogued.

Engine-Level AI

The AI kernel coordinates STT, inference, and TTS with direct access to the audio stream.

Engine-Level AI

The AI kernel coordinates STT, inference, and TTS with direct access to the audio stream.

End-to-End Changes

One team modifies one codebase. No vendor ticket, compatibility wait, or external orchestration layer.

End-to-End Changes

One team modifies one codebase. No vendor ticket, compatibility wait, or external orchestration layer.

Build a Voice AI Agent

Python

TypeScript

Go

Java

Ruby

PHP

Perl

C++

C#

01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22

from signalwire import AgentBase
from signalwire.core.function_result import FunctionResult

class SupportAgent(AgentBase):
    def __init__(self):
        super().__init__(name="Support Agent", route="/support")
        self.prompt_add_section("Instructions",
            body="You are a customer support agent. "
                 "Greet the caller and resolve their issue.")
        self.add_language("English", "en-US", "rime.spore:mistv2")

    @AgentBase.tool(name="check_order")
    def check_order(self, order_id: str):
        """Check the status of a customer order.

        Args:
            order_id: The order ID to look up
        """
        return FunctionResult(f"Order {order_id}: shipped, ETA April 2nd")

agent = SupportAgent()
agent.run()

Python

TypeScript

Go

Java

Ruby

PHP

Perl

C++

C#

01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22

from signalwire import AgentBase
from signalwire.core.function_result import FunctionResult

class SupportAgent(AgentBase):
    def __init__(self):
        super().__init__(name="Support Agent", route="/support")
        self.prompt_add_section("Instructions",
            body="You are a customer support agent. "
                 "Greet the caller and resolve their issue.")
        self.add_language("English", "en-US", "rime.spore:mistv2")

    @AgentBase.tool(name="check_order")
    def check_order(self, order_id: str):
        """Check the status of a customer order.

        Args:
            order_id: The order ID to look up
        """
        return FunctionResult(f"Order {order_id}: shipped, ETA April 2nd")

agent = SupportAgent()
agent.run()

Python

TypeScript

Go

Java

Ruby

PHP

Perl

C++

C#

01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22

from signalwire import AgentBase
from signalwire.core.function_result import FunctionResult

class SupportAgent(AgentBase):
    def __init__(self):
        super().__init__(name="Support Agent", route="/support")
        self.prompt_add_section("Instructions",
            body="You are a customer support agent. "
                 "Greet the caller and resolve their issue.")
        self.add_language("English", "en-US", "rime.spore:mistv2")

    @AgentBase.tool(name="check_order")
    def check_order(self, order_id: str):
        """Check the status of a customer order.

        Args:
            order_id: The order ID to look up
        """
        return FunctionResult(f"Order {order_id}: shipped, ETA April 2nd")

agent = SupportAgent()
agent.run()

Bolt-On AI vs. Embedded AI Kernel

Bolt-On Architecture

Separate telephony, STT, TTS, and LLM providers, each with its own SDK

Your glue code manages state across all four services

Each vendor adds a separate queue, invoice, and escalation path

Compliance and observability must be rebuilt across every vendor

16 to 23 months before a production call

Embedded AI Kernel

Telephony, STT, TTS, and LLM in one platform

AI runs inside the media stack, not outside it

800–1200ms typical response latency

One vendor, one invoice, one escalation path

Production calls in four to six weeks

State management is platform-native

—— Platform Evolution ——

From Open-Source Engine to Cloud Platform

2006: FreeSWITCH Created

An open-source telephony engine built for carrier-scale media processing.

2006: FreeSWITCH Created

An open-source telephony engine built for carrier-scale media processing.

2018–2020: Real-Time Cloud Platform

Real-time WebSocket control and a managed cloud platform brought the engine to developers.

2018–2020: Real-Time Cloud Platform

Real-time WebSocket control and a managed cloud platform brought the engine to developers.

2023–2024: AI Kernel and Governed Inference

AI orchestration moved inside the media engine with production controls and observability.

2023–2024: AI Kernel and Governed Inference

AI orchestration moved inside the media engine with production controls and observability.

2025: Agents SDK

Composable agents, scoped prompts, tools, and tests across multiple languages.

2025: Agents SDK

Composable agents, scoped prompts, tools, and tests across multiple languages.

Try it now

Sigmond Runs on SignalWire

A voice and video AI agent built on the SignalWire SDK, wired to a live knowledge base, able to see what you show him. Build the same thing on voice, phone, WhatsApp, or SIP, or an entire white-label platform with SignalWire as the network underneath.

Sigmond

Trusted by 2,000+ Companies

Build on Two Decades of Voice Infrastructure

One pip install. The same engine that powers carrier-grade telephony worldwide.

Start building

Dive into docs

Build on Two Decades of Voice Infrastructure

One pip install. The same engine that powers carrier-grade telephony worldwide.

Start building

Dive into docs

Build on Two Decades of Voice Infrastructure

One pip install. The same engine that powers carrier-grade telephony worldwide.

Start building

Dive into docs

Build on Two Decades of Voice Infrastructure

One pip install. The same engine that powers carrier-grade telephony worldwide.

Start building

Dive into docs