Trusted by 100+ companies worldwide

Voice APIsMade Simple

Build production-ready voice applications in minutes, not months. Connect to any telephony system with our unified API. From AI agents to autodialers—we handle the complexity.

99.9% Uptime SLA

SOC 2 Compliant

5-min Setup

voice-agent.js

Node.js

import { Callkit } from '@callkit/sdk';

const client = new Callkit(process.env.CALLKIT_API_KEY);

// Deploy AI voice agent in 3 lines
await client.agents.deploy({
  phoneNumber: '+1-555-SUPPORT',
  model: 'gpt-4-turbo',
  voice: 'sarah-professional',
  prompt: 'You are a helpful customer service agent'
});

// That's it! Your AI agent is live 🚀

Everything you need

Production-ready telephony infrastructure with enterprise-grade reliability and developer-first experience.

SIP Trunking

Connect to any SIP provider worldwide. Crystal-clear voice quality with 99.9% uptime guarantee and global redundancy.

WebSocket API

Real-time bidirectional communication for live call control, audio streaming, and instant event handling.

IVR & DTMF

Build sophisticated interactive voice response systems with advanced DTMF detection and call routing.

Global Coverage

Make and receive calls in 100+ countries with local phone numbers and carrier-grade infrastructure.

AI Voice Agents

Deploy intelligent voice bots powered by GPT-4 and Claude for natural, human-like conversations.

Enterprise Security

SOC 2 Type II compliant with end-to-end encryption, fraud protection, and enterprise-grade monitoring.

Built for every voice use case

From startups to Fortune 500 companies, developers choose Callkit.dev to power their voice applications.

Autodialers

Build powerful outbound calling systems for sales, marketing, and customer outreach. Handle thousands of concurrent calls with intelligent routing and real-time analytics.

AI Voice Agents

Deploy conversational AI that sounds human. Perfect for customer support, appointment booking, and lead qualification with natural language processing and sentiment analysis.

In-App Dialpad

Embed voice calling directly into your web or mobile app. Complete with call controls, recording, transcription, and real-time analytics dashboard.

Integrate with 50+ vendors

Connect seamlessly with leading telephony providers, carriers, and communication platforms worldwide.

Don't see your provider? Contact us to add custom integrations.

Developer experience that scales

Stop wrestling with complex telephony protocols. Our unified API abstracts away the complexity so you can focus on building exceptional voice experiences that users love.

RESTful API & GraphQL

Comprehensive documentation with interactive examples

Multi-language SDKs

JavaScript, Python, PHP, Go, Ruby, and more

Real-time Webhooks

Instant event notifications with retry logic

Advanced Analytics

Detailed call logs, metrics, and performance insights

ai-assistant.js

Live Example

// Create intelligent voice assistant
const assistant = await callkit.agents.create({
  name: 'Customer Support AI',
  voice: 'sarah-professional',
  model: 'gpt-4-turbo',
  prompt: `You are a helpful customer service 
representative. Be friendly, concise, and 
always try to resolve issues quickly.`,
  
  tools: [
    'transfer_to_human',
    'lookup_order_status',
    'schedule_callback',
    'process_refund'
  ],
  
  fallback: {
    transferNumber: '+1-555-HUMAN',
    message: 'Let me connect you with a specialist'
  }
});

// Deploy to phone number instantly
await callkit.numbers.assign({
  number: '+1-555-SUPPORT',
  agent: assistant.id
});

console.log('🚀 AI assistant is live!');

Ready to transform your voice applications?

Join thousands of developers who trust Callkit.dev to power their voice communications. Start building today with our generous free tier—no credit card required.

1,000 free minutes

No setup fees

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