Retell AI

Retell AI – The Best AI Voice Agent Platform

Retell AI is a scalable, production-ready AI voice agent platform designed to build, test, deploy, and monitor intelligent voice agents for call operations. It offers native integrations with Cal.com and major VOIP providers, supports batch calling, warm transfers, IVR navigation, branded call IDs, and seamless knowledge base syncing to keep agents up-to-date.

---

Key Capabilities

• Build, test, deploy, and monitor AI voice agents at scale
• Auto-sync knowledge base to keep agents current
• Powerful call transfer with pre-defined handoff messages
• Easy appointment booking via natural language with Cal.com integration
• IVR navigation with digit-based routing
• Branded Call ID for improved trust and deliverability
• SIP trunking and broad telephony integration
• Batch calling and high-concurrency support
• Verified phone numbers to reduce spam risk
• Compliance: SOC 2 Type 1&2, HIPAA, GDPR
• 500ms latency, multilingual support (18+ languages)
• Enterprise-grade reliability with 99.99% uptime and fallback
• Rich analytics and monitoring across calls and sentiment

---

How It Works

1. Build: Use the voice AI API and the agent builder to create custom voice AI agents tailored to your workflows.
2. Test: Run comprehensive tests with built-in LLM capabilities to ensure edge-case handling.
3. Deploy: Launch AI calls across phone, web calls, SMS, and more.
4. Monitor: Track success rates, latency, and sentiment via call history dashboards to identify failures quickly.

---

Use Cases

• Lead Qualification
• Customer Support
• Receptionist / Front-desk Automation
• Dispatch and Service Scheduling
• Debt Collection and Compliance-heavy interactions

---

Core Features

• Auto-Sync Knowledge Base: automatic updates from your knowledge sources
• Powerful Call Transfer: warm transfers with ready handoff messages
• Appointment Booking: natural language scheduling with Cal.com integration
• IVR Navigation: digits-based routing to destinations
• Branded Call ID: improve trust and deliverability
• SIP Trunking & Telephony: connect to any provider
• Batch Calling: campaign execution with scalable concurrency
• Verified Numbers: reduce chance of calls being marked as spam
• Multilingual: 18+ languages, supports international dialing
• Compliance & Security: SOC 2, HIPAA, GDPR compliant
• High Availability: 99.99% uptime with robust fallback
• Analytics & Monitoring: in-depth call analytics and sentiment

---

Integrations & Ecosystem

Seamlessly integrates with CRM, telephony, automation, and databases. Native connections include Cal.com, n8n, Go High Level, Twilio, Vonage, OpenAI, and more. Deployments supported across phone calls, web calls, and SMS.

---

Pricing & Access

• Pay-as-you-go model starting at $0.07 per minute with no platform fees
• Enterprise options available with custom concurrency and premium support
• Free trial and onboarding resources available

---

Security & Compliance

• SOC 2 Type 1&2, HIPAA, GDPR compliant
• Verified numbers and spam-mitigation features
• Enterprise-grade governance and data handling

---

Getting Started

• Sign up for a free account to receive initial usage credits
• Build your AI voice agent, connect to your data sources, test thoroughly
• Deploy to live calls and monitor performance with the analytics dashboard

---

Quick FAQ

• Can I connect my existing phone numbers? Yes, via SIP trunking with major providers.
• How many calls can I run concurrently? Supports high concurrency; plan-based quotas apply for some tiers.
• Do agents support voicemail handling? Yes, voicemail detection and handling are supported.