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Keep Your AI. Replace What Holds It Back. | SignalWire
AI Builders

Keep Your AI. Replace What's Underneath.

Your AI agent works. The telephony layer underneath it adds latency, cost, and failure modes that do not scale.

2,000+
companies in production
< 1.2s
typical AI response latency
2.7B
minutes processed annually
$0.16
per minute, AI processing
The Vendor Chain Problem

Your AI Is Only as Fast as the Slowest Vendor

Every vendor adds latency

Your stack routes audio through a telephony provider, an STT provider, an LLM, and a TTS provider. Each hop adds 100-300ms. Four hops turn a fast LLM into a slow conversation.

Every vendor adds a failure mode

When the call drops at 2am, who gets the ticket? The telephony provider, the STT vendor, or the TTS vendor? Debugging across four dashboards is the real cost.

State splits across systems

Conversation context lives in webhooks, Redis, and vendor callbacks. Transfers lose context because no single system owns the call state.

Costs compound through the chain

Each vendor marks up the layer below it. A four-vendor stack means four margins stacked on top of carrier costs.

Build a Voice AI Agent

from signalwire_agents import AgentBase
from signalwire_agents.core.function_result import SwaigFunctionResult

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 SwaigFunctionResult(f"Order {order_id}: shipped, ETA April 2nd")

agent = SupportAgent()
agent.run()

Multi-Vendor Stack vs. One Platform

Current: Multi-Vendor Stack

  • Telephony provider for numbers and PSTN
  • Separate STT provider
  • Separate TTS provider
  • LLM provider with token billing
  • Your glue code connecting all four
  • Every vendor adds latency and cost

SignalWire: One Platform

  • Phone numbers, SIP, PSTN, media streaming included
  • STT and TTS run inside the AI processing engine
  • AI executes inside the media stack
  • One invoice, sub-second latency
  • Your AI logic stays the same
  • Replace telephony first, consolidate AI when ready

Monthly Cost at 10,000 Minutes

ComponentMulti-Vendor StackSignalWire
Transport (PSTN/SIP)$130-220Carrier rates (separate)
Orchestration middleware$500-2,000Included
STT provider$400-800Included
LLM provider$1,000-4,000+Included
TTS provider$500-2,000Included
Total$2,530-9,020$1,600

Migration Path: Move at Your Own Pace

1

Phase 1: Replace telephony

Point your existing system at SignalWire for phone numbers and PSTN. Your AI orchestration stays unchanged. Immediate cost savings and lower latency.

2

Phase 2: Consolidate AI processing

Move STT and TTS onto the platform. Eliminate separate provider SDKs and invoices. Reduce network hops and latency.

3

Phase 3: Full platform

Move your agent logic to the Python SDK. One stack, one vendor, sub-second latency. Scoped prompts and tools per conversation step.

💡
Every phase delivers value on its own. You do not need to commit to the full migration to benefit from replacing the telephony layer.

FAQ

Can I keep my existing AI orchestration layer?

Yes. Phase 1 replaces only the telephony provider. Your AI logic, agent definitions, and conversation flows stay the same.

How does the migration work with existing phone numbers?

Provision new numbers via API or dashboard, or port existing numbers from your current provider. Typical US porting takes 5-10 business days with no downtime.

What if I use an orchestration tool like Vapi or Retell?

SignalWire replaces the telephony underneath your orchestration layer. Your agent definitions stay the same. Better latency and lower cost from day one.

What does $0.16 per minute include?

AI processing: STT, LLM inference, TTS, and orchestration. Transport (SIP, PSTN) is billed separately at carrier rates. One invoice. Billing counts AI processing time, not total call time.

Is there a standard SIP integration?

Yes. Standards-compliant SIP with full codec support, DTMF, and encrypted media. Built on the same engine that powers major carriers and contact center platforms.

Trusted by 2,000+ companies

Keep your AI. Replace what holds it back.

Better latency, lower cost, and a path to the full platform when you are ready.