AI-Powered Voice Infrastructure

Voice AI that thinks and talks like your best rep

Build AI phone agents that handle real conversations. Sub-300ms latency, natural turn-taking, and full observability. Connect your backend logic via webhook or MCP. We handle the rest.

200 free minutes/month. No credit card required.

<300ms
Average latency
99.9%
Uptime SLA
50+
Languages supported
10M+
Minutes processed
quickstart.sh
// 1. Create an assistant
curl https://api.voicerail.ai/v1/assistants \
  -H "Authorization: Bearer $APLOYEE_KEY" \
  -d '{
    "name": "SupportBot",
    "system_prompt": "You are a calm, competent support rep.",
    "personality": {
      "formality": "neutral",
      "assertiveness": "medium",
      "empathy": "medium"
    },
    "reasoning_mode": "webhook",
    "webhook_url": "https://your-domain.com/aployee"
  }'

// 2. Handle reasoning in your backend
app.post("/aployee", async (req, res) => {
  const { utterance, state } = req.body;

  if (utterance.includes("balance")) {
    const balance = await lookupBalance(state.userId);
    return res.json({
      reply: `Your balance is ${balance}. Anything else?`,
      state: { ...state, lastBalance: balance }
    });
  }

  return res.json({ reply: "Can you tell me more?", state });
});

// 3. Make a call
curl https://api.voicerail.ai/v1/calls \
  -H "Authorization: Bearer $APLOYEE_KEY" \
  -d '{ "assistant_id": "asst_xxxx", "to": "+15551234567" }'

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Built for AI-First Companies

Everything you need for production voice AI

Purpose-built infrastructure for real-time AI conversations. No telephony expertise required.

Sub-300ms Latency

Real-time responses that feel natural. Our dual-agent architecture keeps dialogue flowing while your backend reasons.

AI-Native Architecture

Purpose-built for LLMs. Conversation agent + reasoning agent work in parallel for human-like interactions.

Your Logic, Our Voice

Connect your backend via webhook or MCP. We handle speech, you handle business decisions.

Zero Telephony Complexity

Inbound numbers, outbound dialing, transfers, recordings. No carriers, no SIP, no configuration.

Natural Turn-Taking

Barge-in detection, intelligent interruptions, dynamic pacing. Conversations that feel human.

Personality Controls

Fine-tune formality, assertiveness, empathy, and tone. Predictable behavior without black-box psych models.

Full Observability

Real-time timeline, waveform visualization, latency breakdown across ASR, TTS, and reasoning.

Adaptive Reasoning

Built-in reasoning modes from fast to deep thinking. Let the AI adapt to conversation complexity.

How Aployee works

A dual-agent architecture that keeps conversations flowing naturally

1

Caller connects

Inbound or outbound, we handle the telephony. Your number, our infrastructure.

2

AI converses

Our conversation agent maintains natural dialogue while your backend reasons asynchronously.

3

You decide

Your webhook receives context and returns business decisions. Results blend naturally.

Built for your use case

From sales to support to custom voice products

Outbound Sales

AI reps that qualify leads, handle objections, and book meetings. Your CRM provides the intelligence, we handle the call.

Inbound Support

Agents that authenticate, lookup accounts, and resolve issues. Complex problems route to your backend for resolution.

Voice-First Products

Building a voice product? Skip telephony complexity. Focus on your logic via webhooks while we handle everything else.

Ready to build voice AI?

Get started in minutes. Try the live demo or dive into the docs. 200 free minutes every month.

Simple, transparent pricing

Pay for what you use. No hidden fees. No surprises.

Free

$0/month
  • 200 minutes/month
  • 2 assistants
  • 7-day retention
  • Webhook reasoning
  • Community support
Get Started
Most Popular

Pro

$15/1000 min

+ $29/project/month

  • Unlimited assistants
  • 30-day retention
  • MCP integration
  • Priority scaling
  • Priority support
Start Free Trial

Enterprise

Custom
  • Volume pricing
  • Custom SLAs
  • 90-day+ retention
  • Dedicated support
  • Compliance add-ons
Contact Sales