Low-latency conversations for natural flow

Retell AI's proprietary voice AI orchestration delivers ~600ms latency, which is independently benchmarked as industry-leading. This means conversations stay smooth and fluent, avoiding the awkward pauses that plague many voice bots. For businesses, this translates to a caller experience that feels human, increasing satisfaction and task completion rates.

Business outcome: Higher caller satisfaction and completion rates due to natural conversation flow.

Ultra-realistic voices built from performance data

The platform uses voices refined through human-guided training, making them sound natural and engaging. This is critical for brand perception—callers are more likely to trust and cooperate with an agent that sounds human. Retell AI offers multiple voice options including Retell Platform Voices, Minimax, Fish, Elevenlabs, and more, allowing customization to match your brand's tone.

Business outcome: Enhanced brand trust and caller engagement through realistic voice interactions.

Real-time actions: book, pay, update

Retell AI supports real-time function calling with preset or custom functions, enabling agents to book appointments, process payments, update records, and transfer calls during a conversation. This turns the AI agent from a conversational interface into an operational tool that can complete tasks end-to-end, reducing the need for human intervention.

Business outcome: Streamlined operations with automated task completion, reducing manual workload.

Drag-and-drop call flow designer

The agentic framework allows you to design reliable conversational call flows with a drag-and-drop interface, complete with built-in guardrails. You have full control over agent behavior, making it easy to handle routine requests and edge cases without coding. This reduces deployment time from months to weeks.

Business outcome: Faster time-to-deployment and flexible call handling without engineering resources.

Streaming RAG for accurate answers

Retell AI uses streaming RAG to ensure accurate, real-time answers, backed by a knowledge base that auto-syncs with your website content. This means the AI agent always has the latest information, reducing hallucinations and ensuring customers get correct answers. It's particularly useful for support and FAQ-heavy interactions.

Business outcome: Improved accuracy and customer trust with up-to-date information.

Omni-channel: voice, chat, SMS, API

Beyond voice calls, Retell AI offers chat, SMS, and API integrations, enabling true omni-channel communication. You can deploy AI agents across web, in-app, and text messaging, providing consistent customer experiences. The API allows custom orchestration, making it adaptable to existing workflows.

Business outcome: Consistent customer experience across channels, expanding reach and engagement.

• Low latencyAt ~600ms, conversations are smooth and natural, reducing caller frustration.
• Realistic voicesVoices are trained on real performance data, making them sound human and trustworthy.
• Function callingAgents can complete tasks like booking appointments or processing payments in real time.
• ComplianceHIPAA, SOC2 Type II, and GDPR compliance make it suitable for regulated industries.

• Pricing complexityPer-minute pricing varies with LLM and TTS choices, making cost estimation complex.
• Integration depthWhile API and SIP trunking are available, deep CRM integrations may require custom work.
• Edge casesComplex or highly emotional conversations may still need human escalation.
• Professional RealityIf your calls involve sensitive negotiations or nuanced empathy, you'll need a hybrid approach with human takeover.

Appointment booking for clinics

A medical practice uses Retell AI to handle inbound calls, schedule appointments, and fill underutilized provider capacity. The AI agent answers in seconds, reducing no-shows and freeing staff for patient care.

Lead qualification for sales teams

Sales teams deploy AI agents to qualify inbound leads, gather information, and book meetings. This increases conversion rates by ensuring every lead is followed up immediately, even outside business hours.

Customer support for SaaS

A SaaS company uses Retell AI to handle urgent EV support at scale, cutting support costs by over 50%. The AI agent resolves common issues instantly, improving margins and customer satisfaction.

Debt collection and surveys

Retell AI can run batch calling campaigns for debt collection or surveys, with detailed conversion tracking. This allows organizations to reach more people efficiently while maintaining compliance.

Sign up for a free account on the Retell AI dashboard and receive $10 in free credits.

Choose a pre-built template (receptionist, appointment setter, etc.) or start from scratch.

Configure your agent: select voice, LLM, and add functions for tasks like booking or payment.

Test with the live demo or simulation, then connect your phone number via SIP trunking and go live.