—— SIGNALWIRE FOR STARTUPS

Build and ship without limits, then scale only when it's time

SignalWire gives startups a full programmable communications stack, voice, messaging, video, and AI, built on the engine behind large-scale telecom, with developer-first docs and usage-based pricing.

Start building

Dive into docs

Configure your first AI agent

copy

from signalwire import AgentBase

class MyAgent(AgentBase):
    def __init__(self):
        super().__init__(name="my-agent")
        # Configure your agent here

Configure your first AI agent

copy

from signalwire import AgentBase

class MyAgent(AgentBase):
    def __init__(self):
        super().__init__(name="my-agent")
        # Configure your agent here

Configure your first AI agent

copy

from signalwire import AgentBase

class MyAgent(AgentBase):
    def __init__(self):
        super().__init__(name="my-agent")
        # Configure your agent here

THE PROBLEM

What slows startups down

You're moving fast. Your comms stack shouldn't be the bottleneck.

Opaque APIs

Black boxes that hide what's actually happening. Most platforms abstract so much that debugging is guesswork. You can't optimize what you can't see.

Pricing that punishes growth

Per-seat, per-minute, per-whatever…it adds up fast. Billing that looks affordable on day one turns into a budget conversation before you've found product-market fit.

Docs written for someone else

Guides built for marketing teams, not engineers. You shouldn't need a support ticket to figure out how to route a call. Real developer docs mean real self-service.

THE SOLUTION

Carrier-grade infrastructure, founder-friendly speed

Voice, messaging, video, and AI on one programmable stack: the same FreeSWITCH engine the biggest platforms run, wrapped in clean APIs you can ship against today.

Live before lunch

Real credentials in minutes, no sales call, no sandbox queue.

One stack, not six vendors

Not a CPaaS plus an SMS gateway plus a separate AI vendor.

Pricing that fits a seed budget

Usage-based from call one. No seat minimums, no platform fee.

Won't break at Series B

he same engine scales from your first call to your ten-millionth.

Deploy.py

copy

from signalwire import AgentBase, AgentServer

class SalesAgent(AgentBase):
    def __init__(self):
        super().__init__(name="sales-agent")
        self.add_language("English", "en-US", "rime.spore")
        self.prompt_add_section("Role", "You are a sales representative.")

class SupportAgent(AgentBase):
    def __init__(self):
        super().__init__(name="support-agent")
        self.add_language("English", "en-US", "rime.spore")
        self.prompt_add_section("Role", "You are a support specialist.")

if __name__ == "__main__":
    server = AgentServer(host="0.0.0.0", port=3000)

    server.register(SalesAgent(), "/sales")
    server.register(SupportAgent(), "/support")

    server.run()

Deploy.py

copy

from signalwire import AgentBase, AgentServer

class SalesAgent(AgentBase):
    def __init__(self):
        super().__init__(name="sales-agent")
        self.add_language("English", "en-US", "rime.spore")
        self.prompt_add_section("Role", "You are a sales representative.")

class SupportAgent(AgentBase):
    def __init__(self):
        super().__init__(name="support-agent")
        self.add_language("English", "en-US", "rime.spore")
        self.prompt_add_section("Role", "You are a support specialist.")

if __name__ == "__main__":
    server = AgentServer(host="0.0.0.0", port=3000)

    server.register(SalesAgent(), "/sales")
    server.register(SupportAgent(), "/support")

    server.run()

Deploy.py

copy

from signalwire import AgentBase, AgentServer

class SalesAgent(AgentBase):
    def __init__(self):
        super().__init__(name="sales-agent")
        self.add_language("English", "en-US", "rime.spore")
        self.prompt_add_section("Role", "You are a sales representative.")

class SupportAgent(AgentBase):
    def __init__(self):
        super().__init__(name="support-agent")
        self.add_language("English", "en-US", "rime.spore")
        self.prompt_add_section("Role", "You are a support specialist.")

if __name__ == "__main__":
    server = AgentServer(host="0.0.0.0", port=3000)

    server.register(SalesAgent(), "/sales")
    server.register(SupportAgent(), "/support")

    server.run()

Developer Toolkit

Everything you need to
build smarter voice systems

Code samples, quick starts, and templates for SignalWire's APIs, built to help you ship production-ready voice and AI features fast. Use the toolkit end-to-end, or drop in just the pieces you need.

AI Agent Tools

Core Voice Platform

Real-Time Call Control

Build voice agents with the Agent SDK

Prompt orchestration, tool calls (skills), barge-in handling, multi-agent support, and agent memory. Use modular skills and the integrated voice stack to design live AI behavior.

Learn More

Structure prompts for consistent behavior

Tone control, fallback handling, and reusable logic across agents. Define reusable, named prompts inside the Agents SDK.

Learn More

Store & retrieve context with the DataSphere RAG

AI agent memory, personalization, and retrieval-augmented grounding. Ground agents in your own data. Add the DataSphere skill to search a knowledge base mid-conversation.

Learn More

AI Agent Tools

Core Voice Platform

Real-Time Call Control

Build voice agents with the Agent SDK

Prompt orchestration, tool calls (skills), barge-in handling, multi-agent support, and agent memory. Use modular skills and the integrated voice stack to design live AI behavior.

Learn More

Structure prompts for consistent behavior

Tone control, fallback handling, and reusable logic across agents. Define reusable, named prompts inside the Agents SDK.

Learn More

Store & retrieve context with the DataSphere RAG

AI agent memory, personalization, and retrieval-augmented grounding. Ground agents in your own data. Add the DataSphere skill to search a knowledge base mid-conversation.

Learn More

Community

Where developers find their people and build what's next

From the FreeSWITCH project that started it all to the engineers shipping voice AI today. When you have questions, Discord, the forum, and the Friday Hangouts have answers.

Explore the full community

Join the Discord

12,000+

Discord members

38,000+

FreeSWITCH stars

20+

Years open source

Every Friday

Hangouts

Learn

API reference, SDK guides, and quick starts at developer.signalwire.com, go from first call to production at your own pace.

Learn More

ClueCon

Meet the team and the community in person at ClueCon, SignalWire's annual developer conference on telecom and AI

Learn More

GitHub

Open-source SDKs, example code, and guides, all on GitHub. File issues, send pull requests, or fork it.

Learn More

Customer proof

Shipped by developers who move fast

“Using that same [original] code base, we push almost 2.5 million minutes a month through SignalWire. It’s very scalable and very easy to do proof of concept and implementation in it.”

David Plappert

Founder at PhoneLiveStreaming

“Using that same [original] code base, we push almost 2.5 million minutes a month through SignalWire. It’s very scalable and very easy to do proof of concept and implementation in it.”

David Plappert

Founder at PhoneLiveStreaming

Learn how a solo founder shipped a live-audio product in six hours and scaled it to 2.5 million minutes a month.

Read the story

FAQS

Frequently asked questions

What to know before you build your first project, no sales call required.

Is SignalWire free to try?

You can create real credentials and start building immediately. There's no sandbox queue or sales call required to get access.

What certifications and frameworks do you support?

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.

How does pricing work for a small team trying SignalWire?

Do I need a sales call to get started with SignalWire?

No. You can sign up and get working credentials directly; sales involvement is optional, not required, for standard usage.

Can SignalWire handle it if we grow fast?

Yes. The same underlying engine that SignalWire runs and maintains is used in large-scale telecom deployments, so scaling up doesn't require switching platforms.

Do I need telecom experience to get started with SignalWire?

No. The docs and SDKs are written for application developers, not telecom engineers.

What's the difference between SignalWire and a standalone AI voice tool?

SignalWire combines the underlying telephony (voice, SMS, video) with the AI agent layer natively, so you're not manually connecting an AI tool to a separate telephony vendor.

Let's build something together

Spin up test credentials in minutes. Ship to production on the same engine the biggest platforms trust.

Join the discord

Start building

Let's build something together

Spin up test credentials in minutes. Ship to production on the same engine the biggest platforms trust.

Join the discord

Start building

Let's build something together

Spin up test credentials in minutes. Ship to production on the same engine the biggest platforms trust.

Join the discord

Start building

Let's build something together

Spin up test credentials in minutes. Ship to production on the same engine the biggest platforms trust.

Join the discord

Start building

Build and ship without limits, then scale only when it's time

Build and ship without limits, then scale only when it's time

What slows startups down

Opaque APIs

Pricing that punishes growth

Docs written for someone else

Carrier-grade infrastructure, founder-friendly speed

Live before lunch

One stack, not six vendors

Pricing that fits a seed budget

Won't break at Series B

Everything you need to build smarter voice systems

Build voice agents with the Agent SDK

Structure prompts for consistent behavior

Store & retrieve context with the DataSphere RAG

Build voice agents with the Agent SDK

Structure prompts for consistent behavior

Store & retrieve context with the DataSphere RAG

Where developers find their people and build what's next

Learn

ClueCon

GitHub

Shipped by developers who move fast

Frequently asked questions

Frequently asked questions

Let's build something together

Let's build something together

Let's build something together

Let's build something together

Everything you need to
build smarter voice systems