Retell AI is an AI voice agent platform for developers. It builds real-time phone agents with built-in telephony, SIP trunking, and IVR routing. Moreover, it has a basic no-code UI for faster setup. As a result, it is one of the top choices for teams building AI call centers in 2026.
Key Features
Retell AI has a complete voice stack for phone agents. First, it includes native telephony with SIP, IVR routing, and call controls. Second, it offers a visual agent builder that reduces setup time. Then, it supports multiple LLMs like GPT-4, Claude, and Gemini. In addition, it handles 20 concurrent calls free and scales beyond. Furthermore, it has warm transfer, branded calls, and post-call analytics. Plus, it is SOC 2, HIPAA, and GDPR compliant. So it fits teams that need production-ready voice agents fast.
Pricing Plans
Retell AI has usage-based pricing with no platform fee. Voice agents start at $0.07 per minute. But real costs run $0.13 to $0.37 per minute with LLM, TTS, and telephony. Also, 20 concurrent calls are free, then $8 per month per extra slot. Phone numbers cost $2 per month. So costs scale with usage, making it hard to predict.
Who Uses Retell AI?
Retell AI fits developers and tech teams. For instance, a startup can build an AI receptionist for customer support. Similarly, a healthcare firm can create HIPAA-compliant appointment reminders. In contrast, a sales team can run outbound lead qualification campaigns. But non-technical teams may struggle without developer help. So it fits engineering-led organizations.
How Retell AI Compares
Retell AI wins on built-in telephony and ease of use. First, it has native SIP and IVR, which Vapi lacks. Second, it has a basic visual builder, while Vapi is fully API-only. However, Vapi has a lower platform fee at $0.05 per minute and more provider choices. Also, Vapi has sub-600ms latency vs Retell at 600-800ms. You can explore more tools in our AI Tools Directory or compare with Vapi for voice agents. For updates, visit Retell AI.
Best For
Retell AI fits developers and tech teams who need a complete voice agent platform with built-in telephony, visual builder, and compliance certifications for production call centers.
