Retell AI

Retell is a strong choice for businesses that want an AI phone agent capable of more than reading a fixed script. Its real value is the combination of live conversation, knowledge retrieval, appointment booking, CRM actions, call routing and human handoffs. That makes it much closer to an automated phone employee than a simple voice chatbot.

The main weakness is cost and setup complexity at scale. The advertised $0.07 to $0.31 per minute is only the starting range, because your selected LLM, voice, telephony and add-ons affect the final rate. I also wouldn't put a new agent straight onto customer calls without testing difficult cases, especially interruptions, unusual requests and handoffs. For companies with meaningful phone volume, though, Retell has the right pieces for a serious production workflow.

Retell is a voice AI platform that lets businesses build AI agents for real phone conversations. These agents can answer calls, make outbound calls, answer questions from a business knowledge base, book appointments, qualify leads and transfer callers to human staff when needed.

The platform gives you more control than a basic AI receptionist. You can connect a knowledge base using webpages or documents, define how the agent should handle calls and test conversations before putting the agent on a live number. Retell also provides call analytics, transcripts, webhooks and API access for teams that need to connect the agent with existing software.

The pricing model is usage-based. You start with $10 in free credits, then pay according to the voice agent configuration and minutes used. The current published range is $0.07 to $0.31 per minute, while individual components such as the voice engine, text-to-speech, LLM and telephony can affect the final cost.