
Retell AI
Retell AI is a voice agent platform for building human-like AI phone agents with lightning-fast responses and natural conversations.





What is Retell AI
Retell AI is an AI voice agent platform that lets businesses build, test, and deploy smart phone agents. These agents can handle both incoming and outgoing calls with human-like conversation skills and response times of under one second.
Unlike traditional phone systems that use robotic voices and menu options, Retell AI creates natural conversations. The agents can understand what callers are saying, respond appropriately, and even handle interruptions just like real people would.
The platform integrates with existing phone systems, customer databases, and business tools. It supports over 18 languages and meets important security standards like HIPAA and GDPR. Businesses can use these voice agents for customer support, sales calls, appointment scheduling, lead qualification, and many other phone-based tasks without needing large call center teams.
How to Use Retell AI
Using Retell AI is straightforward, whether you are a developer or business owner. Here's how to get started:
Sign up and get free credits: Create an account and receive $10 in free credits to test the platform.
Build your agent: Use the intuitive agent builder or API to create your voice agent. Choose from templates for common tasks like customer service or sales.
Configure the voice: Select from premium voice options that sound natural and human-like.
Connect your systems: Integrate with your existing phone numbers, CRM, and business tools.
Test thoroughly: Use the built-in testing tools to make sure your agent handles different situations correctly.
Deploy and monitor: Launch your agent for live calls and track performance through the dashboard.
Tips for success:
Start with simple tasks before adding complexity.
Test with real scenarios your customers might encounter.
Monitor call analytics to improve performance.
Use webhooks to connect with your business workflows.
Features of Retell AI
Human-like voice agents with sub-second response times
Multi-language support for 18+ languages
BYOC telephony integration with major providers
Warm transfers and IVR navigation capabilities
Real-time webhooks and API connectivity
Batch calling and verified phone numbers
Enterprise security and compliance (SOC 2, HIPAA, GDPR)
Advanced testing and monitoring tools
Knowledge base auto-sync
Custom LLM integration support
Retell AI Pricing
Free Trial
$10
- $10 in free credits (≈60 minutes)
- 20 concurrent calls
- Basic voice agents
- Testing environment
- Discord community support
- Demo repository access
Pay-as-you-go
$0.07
- $0.07-$0.08 per minute
- No platform fees
- Premium voice synthesis
- Multi-language support
- Basic telephony included
- Webhook integrations
- Real-time monitoring
- API access
Enterprise
Custom
- Volume discounts (as low as $0.05/min)
- Minimum $3,000/month spend
- Dedicated Slack support
- Priority assistance
- Advanced compliance features
- Custom integrations
- White-glove service available
- 99.99% uptime SLA
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