Retell AI

Retell AI is a third-generation, LLM-powered voice AI platform that enables businesses to build, deploy, and manage human-like AI voice agents for phone call automation. Unlike traditional IVR or NLP-based IVA systems, Retell uses large language models to enable natural, multi-turn conversations with approximately 600ms latency, making interactions indistinguishable from human agents. The platform supports a wide range of use cases including lead qualification, customer support, appointment booking, receptionist services, dispatch, and debt collection across industries such as healthcare, financial services, insurance, logistics, and retail.

Retell AI is designed to serve both startups and enterprise-scale teams, offering a drag-and-drop agentic framework, real-time function calling, streaming RAG-powered knowledge bases, and comprehensive post-call analytics and AI quality assurance. Its telephony stack supports SIP trunking, batch calling, branded caller ID, and verified phone numbers, and it integrates with major platforms including HubSpot, Salesforce, Twilio, Vonage, GoHighLevel, Zapier, Genesys, and more.

The platform is built for compliance and enterprise-grade security, holding HIPAA, SOC2 Type II, and GDPR certifications. It offers custom role-based access control, personal data redaction, SSO, and even on-premise deployment options. Businesses can get started with a free account that includes $10 of free usage, making it accessible for teams looking to modernize their call operations without lengthy implementation timelines.